Attended Vanderbilt University (TN) and St. John's (MA) Preparatory School.... Is the grandson of Hall of Famer Carl Yastrzemski, who
played 23 years with the Boston Red Sox from 1961-1983 where he was the 1967 AL MVP and an 18-time All-Star...won the triple crown 1967.... Selected in the 36th round of the 2009 First-Year Player Draft by Boston but did not sign and elected to attend Vanderbilt...was also drafted after his junior season at Vanderbitl by Seattle (30th round, 2012) but returned to school.... Played at Vanderbilt with Tyler Beede, Dansby Swanson, Walker Buehler, Tony Kemp, Bryan Reynolds and Sonny Gray.... Mike's father, Carl Michael (who also went by Mike), was a third-round pick by the Atlanta Braves in 1984...played in the minors from 1984-88, reaching as high as Triple-A in the White Sox organization.
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.