Born in Andover, Mass., located in Essex County...His father, Carl Michael (who also went by Mike), was a third-round pick by the Braves in 1984 and played in the minors from 1984-88, reaching as high as Triple-A in the White Sox organization. His father passed away in 2004...Is the grandson of Hall of Famer Carl Yastrzemski, who played 23 seasons for the Boston Red Sox from 1961-83 and was an 18-time All-Star, seven-time gold glover, three-time batting champion and also a triple crown and MVP winner...Married his college sweetheart Paige Cahill on Nov. 10, 2018 in Nashville, Tenn. The two welcomed their first child, Quinley Mae, on Dec. 3, 2021...His first concert was the Backstreet Boys when he was eight. He rode in a limo for the first time to the show...Enjoys golfing in his spare time...His favorite pizza topping is pepperoni...Grew up a Patriots fan and his favorite non-baseball athlete is Tom Brady...Works with Heart and Armor, a Bay Area organization, since 2021 to connect more deeply with veterans. Yastrzemski and the group had conversations about mental health, resilience, history and taking care of one another.
Made his third career Opening Day roster with San Francisco and appeared in a career-high 148 games...Tested positive for COVID on April 24 prior to the game in Washington...felt symptoms the day before (sore throat) and when they persisted he got tested...was placed on the IL on April 25 and missed eight games before being reinstated from the IL on May 4...Hit .309 (34-for-110) with 23 runs, nine doubles, four homers, 15 RBI and a .909 OPS over his first 34 games of the season...Recorded a career-high five RBI on June 3 at Miami... went 2-for-5 with a double and a home run...On July 15 vs. Milwaukee’s Josh Hader in the ninth inning, he hit his second career grand slam, a walk-off blast to center field that gave the Giants an 8-5 victory in a game they had trailed 5-2 entering the 9th inning... he became the first Giant to hit a walkout grand slam since Bobby Bonds did it on Sept. 3, 1973 vs. LAD....Had a 0-for-27 hitless streak from Aug. 13-21 and hit just .074 (4-for-54) from Aug. 13-31...Recorded his fourth career multi-homer game on Aug. 7 at Oakland...Drove in 12 runs over his last 15 games while hitting .286 (16-for-56) with four doubles and five homers...Hit .261 (23-for-88) with 13 XBHs (8 2Bs, 3B, 4 HRs) in 26 games in Sept., up from .119 in 26 games in Aug..36 of his 66 hits after June 1 went for extra bases (21 doubles, two triples and 13 homers).
Hit a career-best 25 homers in his third season with the Giants...previous career-best was 21 as a rookie in 2019...also had a career-best 71 RBI, 28 doubles and 51 walks...Became the first Giants outfielder to hit 25 homers since Hunter Pence hit 27 in 2013...56 of his 105 hits (53.3%) went for extra-bases (28 2Bs, three 3Bs, 25 HRs)...Was the third-fastest Giant to reach 125 career extra base hits (284 games) in team history behind Hall of Famers Orlando Cepeda (269g) and Willie Mays (273g) (Stats, LLC)...Over his final 23 games over the regular season, Yastrzemski hit .274 with four doubles, four homers, 19 RBI and a .919 OPS...Hit .170 (19x112) vs. LHP...hit .284 (19x67) vs. LHP in 2020...Batted .204 (22x108) with RISP but was 9-for-his-last-17 (.529) with RISP and 16 RBI...drove in 13 runs over his final 11 games of the regular season...Started 119 games for SF and appeared in a team-high tying 139 games overall...IF Wilmer Flores also appeared in 139 games.
POSTSEASON: Made his first career postseason roster and appeared in all five of the NLDS games (four starts), going 0-for-13.
In just his second career Major League season he established himself as one of the top players in baseball, hitting .297 (57-for-192) with 39 runs scored, 14 doubles, four triples, 10 home runs, 35 RBI and 30 walks in 54 games...His .968 OPS ranked as the seventh-highest figure among NL leaders...Appeared in 54 of SF's 60 games, making 52 starts (27 in right field, 24 in CF and one in left)...Missed parts of the last week of the regular season (six games total) with a mild right calf strain...Reached base safely via hit, walk or hit by pitch 90 times (57 hits, 30 walks, 3 HBP), 13th-most in the NL...Hit .270 (31-for-115) with seven doubles, one triple, eight homers and 22 RBI with two strikes...Was 10-for-18 (.556) on the first pitch...28 of 57 hits went for extra-bases (14 doubles, four triples, 10 home runs)...His 10 go-ahead RBI led the team while his four game-winning RBI were tied for second-most...Made his first career Opening Day roster and was in the starting lineup that night at LAD, starting in center field...Registered his second career multi-homer game and his first of the 2020 season on July 29 vs. San Diego... homered off Chris Paddack in the 3rd inning then hit a game-winning, walk-off solo shot in the 9th off Matt Strahm, his second career walk-off home run...it also marked his first career “Splash Hit” home run and just the third walk-off “Splash Hit” homer by a Giants player (also: Barry Bonds, August 19, 2003 vs. Atlanta and Brandon Crawford, April 13, 2014 vs. Colorado)...Became the second leadoff batter in Giants history to have a multi-homer game that included a walk-off HR...Larry Doyle also did so in the first game of a doubleheader against the Brooklyn Superbas on Sept. 8, 1909...Homered off Clayton Kershaw on August 8 at Dodger Stadium becoming just the second Giants left-handed hitter to homer off the Dodgers’ ace (also: Joe Panik on on 3/29/18)...Hit his first career leadoff home run on August 18 at Los Angeles-AL, hitting the solo homer off RHP Dylan Bundy...Left the game on September 18 vs. Seattle with a tight right calf...underwent an MRI the next day that revealed a mild strain...missed six games and was back in the starting lineup for a doubleheader vs. SD on September 25.
Became the first Giants rookie to hit 20-or-more homers in a season since Dave Kingman hit 29 in his rookie year of 1972...Finished the season tied for the team lead in homers with OF Kevin Pillar...Yastrzemski became the fifth player in the live-ball era to make his Major League debut in May or later and end up leading his team in homers that season...Never hit more than 15 home runs in a minor league season with the Orioles...counting his time in Triple-A with the Giants, he hit 33 homers across two levels in just 147 games...Was one of four rookies to hit at least 21 homers and post an .850 OPS...the others were NYM's Pete Alonso (53 HR, .941 OPS), HOU's Yordan Alvarez (27 HR, 1.067 OPS) and SD's Fernando Tatis Jr. (22 HR, .969 OPS)... The only other Giant rookie in the SF-era (1958-pres.) to reach those totals (20 HR and .850 OPS) besides Yastrzemski was Orlando Cepeda in 1958...His 55 RBI since May 30 were tied for fifth-most among all MLB rookies while his 21 homers since May 25 (his MLB debut) were tied for fourth-most among all MLB rookies...Was the first Giants rookie with at least 15 homers and 15 doubles in a season since Buster Posey in 2010...His 18 home runs through 81 games were the thirdmost by a Giant through their first 81 career games in SF Giants history (since 1958)...trailed Willie McCovey (22 home runs) and Orlando Cepeda (19 home runs)...Posted a .590 slugging percentage on "low pitches" according to Sports Info Solutions... the only player with a better slugging percentage on such pitches was LAA's Mike Trout (.623)...His 2.8 WAR was the most by a Giants position player and the second-highest on the team behind pitcher Jeff Samardzija's 2.9 WAR...Had his contract selected from Triple-A Sacramento on May 25, replacing OF Mac Williamson on the roster...The St. John's Prep and Vanderbilt University product played 703 games in the minors with 2,600 at-bats...he was hitting .316 with 12 homers and 25 RBI in 40 games with Triple-A Sacramento at the time of his promotion to SF...Recorded his first big league hit on May 26 against Arizona, hitting a bloop single to left field off RHP Luke Weaver...however, was thrown out 7-3 after trying to stretch the single into a double and was caught at first base...finished the day 3-for-4 with a double...On May 31 at Baltimore he collected his first career triple in his first at-bat then hit his first MLB home run in his second at-bat, a solo shot off RHP Andrew Cashner...became the sixth Giant since 1900 to record his first career home run and triple in the same game...the last Giant before Yastrzemski was Fred Lewis on May 13, 2007 at Colorado (Elias)...Went 9-for-20 (.450) with three doubles and two home runs in a four-game series at Colorado from July 15-17...his 18 total bases over the four game set were tied with Rich Aurilia for the third most by a Giants' rookie in a four-game series (Buster Posey: July 5-8, 2018 at MIL- 21 TB and Hack Wilson June 26-29, 1924 vs. ATL- 19 TB) (Stats, LLC)...Recorded a career-best four hits in game one of a doubleheader on July 15 at Colorado...was a triple shy of hitting for the cycle as he finished 4-for-5 with four runs scored, two singles, a double and homer...became the sixth different Giants rookie (seventh occurrence) to have four runs scored and four hits in the same game...the last to do it was Damon Minor on July 2, 2002 at Colorado (four runs, four hits)...Hit a walk-off solo homer on July 21 in the 12th inning off Mets' RHP Robert Gsellman and became the first Giants player to hit a walkoff homer in his first MLB season since Al Gallagher in 1970 off Bob Priddy (Stats, LLC), Recorded his second career four-hit game on July 28 at San Diego...Hit his 10th homer of the year August 2 at Colorado, a 472' homer according to Statcast...was the second longest homer by a Giant since 2015...Had a career day on August 16 at Arizona, going 3-for-6 with three runs scored, three home runs and a careerhigh four RBI...Became the second Giants rookie in franchise history with a three-HR game, joining Jarrett Parker (September 26, 2015 at Oakland)...Yastrzemski's three homers marked the 31st three-plus homer game in franchise history and the 19th in the San Francisco era (since 1958)...Recorded his first career three-homer game in what was his 70th career MLB game...his grandfather, Carl, also had one three-homer game in his career on May 19, 1976 at Detroit...Became the first Giants player in franchise history to hit three homers out of the leadoff spot in the lineup...Hit nine home runs during August, the most by a Giants rookie in any month in more than 50 years, and one shy of the franchise rookie record for a month... Rattled off an 18-game on-base streak from September 6-27, the third-longest by a Giants rookie since 2000...trailed a 25-game streak by Buster Posey in 2010 and a 20-gamer by Matt Duffy in 2015...Playing in his first game at Fenway Park as a big leaguer on September 17, Yastrzemski hit his 20th home run to dead center field, the first homer by a Yastrzemski at Fenway Park since Carl took Moose Haas deep on July 31, 1983...Slugged his first career pinch-hit homer on September 26 vs. Colorado... was the first Giants rookie to record a pinch-hit home run since Jarrett Parker on September 15, 2015 vs. Cincinnati.
Named a MiLB.com Organization All-Star...Played in a combined 121 games between Double-A Bowie and Triple-A Norfolk, hitting .250 (107-for-428) with 28 doubles, six triples, 10 home runs, 61 runs, and 60 RBI... Drove in a career-high six RBI on 8/15 at Pawtucket, while also recording his fifth career multi-home run game... Batted .278 (30-for-108) with five doubles, five home runs, 20 runs, and 16 RBI in 28 August games for Triple-A Norfolk; ranked tied for fifth in the International League in runs, tied for sixth in home runs, and tied for 14th in RBI.