Pronounced JYE-roh MOON-yohs...He and his wife, Yessica, have two children: Yairo Jr. and Yarianny...His brother, Jairo, was a RHP in the Royals (2011-14), Phillies (2015-16) and Rays (2017) minor league systems.
Attended ML Spring Training camp with the Cardinals and Summer Camp with the Red Sox...Spent most of July and August at the Sox’ Alternate Training Site and September in the majors...Played in 12 games in his 1st season with the Red Sox...Made seven starts in LF, four in RF and one at DH. Batted .333 (15-for-45, 5 2B, 1 HR)…Hit safely in nine of his 12 games, with multiple hits in four of those...Recorded two OF assists, both while playing LF...Were the first two OF assists of his ML career.
Began season on the Opening Day roster; was optioned following 4/6 game vs. SD and appeared in three games for Memphis, batting .231 (3-13) with a home run and two RBI...Was recalled on 4/16, three days after being recalled as 26th man for Mexico Series. Would hit a pinch-hit double later that night at Milwaukee...Hit safely in 20 of 29 games started this season (.303, 33-109, 12 RBI, 8 XBH)...Made starts at 3B (11G), 2B (3G), SS (6G), LF (3G), CF (4G) and RF (2G)...Ranked 2nd on the Cardinals with seven pinch-hits...Batted .282 (31-110) with two home runs on the road...Batted .485 (16-33) when leading off an inning; would have led all of Major League Baseball, but did not have the qualifying plate appearances...Matched season-high with 3 hits on 8/17 - 4th time in 2019 & 2nd time vs. CIN (7/21 at CIN)...Had two of his four three-hit games vs. Cincinnati...Was 3-for-4 with a HR (#2), first career triple and an RBI single on 7/21 at CIN...Recorded his 50th career RBI vs. ARI (7/14) with an RBI single...Led the Cardinals with a .345 BA (10-29) in the month of June...Started and batted lead-off for the 3rd career game at SEA (7/2) and hit game-tying 2-run HR in the 7th inning...Posted a .196 (18-92) batting average with two strikes after batting .247 (39-158) in 2018.
Made the Opening Day roster out of Spring Training and appeared in 108 games, T-9th among National League rookies...Started 72 games at a team-leading six different positions (SS-34, 2B-23, 3B-6, LF-1, CF-3, RF-5). • Was one of 26 Major League players in 2018 to appear defensively at six or more positions (three players appeared at eight positions and 12 players at seven positions)...Joined José Oquendo (1987), Possum Whitted (1913), and John Houseman (1897) as the only Browns/Cardinals in franchise history to appear defensively in three or more games at 2B, 3B, SS, LF, CF, and RF in a single season...Committed team-leading 18 errors (T3rd in NL), most by a Cardinals rookie since Albert Pujols (20) in 2001...Tied with Patrick Wisdom for 2nd on the Cardinals with five pinch hits (5-15, .333)...Ranked among National League rookies in batting (.276, 7th), RBI (42, T-7th), runs (39, 8th), hits (81, 10th), doubles (16, T-7th), walks (30, 7th), intentional walks (7, 2nd), on-base pct. (.350, 6th) and slugging pct. (.413, 8th)...Led the Cardinals and ranked 9th in the National League in two-strike batting average (.247, 39-158)...Did not go more than two consecutive starts without a hit or run all season...Batted .353 (42-119) with runners on base, the highest mark on the team, but did not qualify for league leaders...Went combined 8-for-13 (.615) with 2 HR, 5 RBI and a double off Max Scherzer, Clayton Kershaw, Madison Bumgarner, Zack Greinke and Corey Kluber, with home runs off of Scherzer (9/3 at WSH) and Bumgarner (7/8 at SF)...His seven intentional walks were the most by a Cardinals rookie since Pete Kozma (8) in 2013, and three shy of the club record of 10 by Mike Tyson in 1973...Started his first Major League game (3B) in the Cardinals Home Opener vs. Arizona (4/5)... Recorded his first MLB hit and home run at Miller Park with a 9th inning single off Oliver Drake (4/2) and a two-run home run off Brent Suter (5/28)...Tallied his first MLB extra base hit with a pinch-hit double at CIN (4/13)...Was the Cardinals first pinch hit for extra bases in 2018...Was optioned to Memphis (AAA) on 4/16 with Mike Mayers when Jedd Gyorko and Luke Gregerson were activated from the disabled list...Recalled (5/18) with Tyler O'Neill when Paul DeJong and Matt Bowman were placed on the 10-day DL...Went 4-for-4 vs. KC (5/21), the first Cardinals rookie with four hits in a game since Paul DeJong (7/8/17 vs. NYM) and the 8th instance an MLB rookie had 4 hits in 2018...Recorded his first career walk-off hit and home run vs. PIT (5/31), a three-run shot off Felipe Vázquez, tallying a season-high five RBI. He was the third Major League rookie with 5 RBI in a game in 2018 (Niko Goodrum, DET & Christian Villanueva, SD) and the first Cardinal since Stephen Piscotty (8/23/15 at SD)...Recorded a pair of 14-pitch plate appearances: 6/26 vs. CLE, a groundout against Dan Otero & 8/6 at MIA, a groundout against Tayvon Guerrero; T-2nd longest plate appearances behind Yadier Molina's 15-pitch plate appearance (4/29 vs. PIT), a single off Michael Feliz (Elias)...Hit game-tying homer (#4) at ARI (7/4) ending Yoshihisa Hirano's scoreless inning streak at 26 games...Missed 11 games (8/11-8/21) with a right wrist sprain suffered at Kansas City (8/10)...Played two-game rehab assignment with Springfield (8/18-8/19)...Batted .283 (28-93) with 3 HR and 13 RBI in 28 games between Memphis and Springfield, starting games at five different positions during his minor league tour (SS, 3B, 2B, LF, CF)...Hit grand slam at Oklahoma City (5/10) while with Memphis totaling his minor league single-game high of 4 RBI...Hit a pair of 7th inning HR's and went 3-for-5 with 4 RBI on 2/28 in 10-9 Spring Training win at Orioles.
Batted .300 with 13 HR, 68 RBI and a career-high 22 stolen bases in 112 games between Midland (AA) and Nashville (AAA) ... Started at six different defensive positions over the season with the most at shortstop (46), followed by third base (36), centerfield (20), right field (5), left field (3) and second base (2) ... Established new career-highs in triples (4), while matching his highs in home runs (13), doubles (26) and sac flies (7) ... Posted a career-high 5 RBI at Omaha (7/18) going 3-for-5 with two doubles and a home run ... Was 18-for-35 (.514) from 8/24-9/1 hitting safely in all eight games with six multi-hit games ... Had three games with two stolen bases (6/3 at NW Arkansas, 6/10 vs. Frisco & 8/9 at Tacoma) ... Posted an RBI in five straight games (5/31-6/4) ... Scored a run in seven straight games (5/28-6/4) ... Played in five games for the Toros del Este in the Dominican Winter League.
Batted .240 with nine home runs and 39 RBI in 102 games in his Double-A debut with Midland…walked just 23 times and matched his career low with a .286 on-base percentage…equaled his career high with three triples…was 6-for-13 (46.2%) in stolen base attempts…hit .313 (30-for-96) against left-handed pitchers compared to .216 (63-for-291) against right-handers…had a .219 batting average with four home runs in 34 games before the All-Star Break, .252 with five home runs in 68 games after the break…batted .246 with all nine of his home runs in 92 night games…hit .195 in 10 day games…connected for six of his nine home runs on the road…went 0-for-10 with one RBI the bases loaded…appeared in 41 games at shortstop, 27 at second base and 25 at third base…committed 12 errors as a shortstop (.937 fielding percentage), three as a second baseman (.979) and four as a third baseman (.956)…also batted .303 in nine games as the designated hitter…hit in every spot in the order except leadoff…saw his most action batting seventh where he had a .290 batting average in 28 games…began the season on the disabled list with a bruised right heel…was reinstated April 26 and hit safely in each of his first three games (4-for-11, .364)…went 3-for-4 with a double, two home runs and a season-high four RBI May 9 at Frisco…also homered the next day against the RoughRiders…then homered just once over his next 76 games…collected a season-high four hits May 14 at San Antonio and a four-game hitting streak from May 14 to 19 (7-for-16, .438) boosted his season batting average to .281…then went 13-for-81 (.160) over his next 20 games to fall to .214 on June 23…had his lone two-steal game of the season May 17 against Frisco and also walked a season-high three times…had a 17-game streak without an extra base hit from May 23 to June 23…went 10 consecutive games without a strikeout from July 9 to 19…had a season-high nine-game hitting streak from July 13 to 21 (13-for-33, .394), which boosted his average from .225 to .249…had a 23-game streak without a walk from July 17 to Aug. 12…went 2-for-32 (.063) over a nine-game stretch from Aug. 6 to 16…then hit .304 with four home runs and 10 RBI over his final 18 games…homered in back-to-back games a second time Aug. 30 and 31 against San Antonio…hit .387 (12-for-31) with seven runs scored, three doubles and four RBI in eight postseason games for the Texas League Champion RockHounds…played for Mesa in the Arizona Fall League following the season and batted .270 with no home runs and seven RBI in 21 games.
Played in a career-high 136 games between Beloit (A) and Stockton (A) ... Named as a Midwest League Mid-Season All-Star. Played as a defensive replacement for the West Club and was 0-for-1 in the game ... Posted career highs in at-bats (519), runs (69), hits (135), doubles (26), triples (3), home runs (13), RBI (74), walks (33) and strikeouts (82) ... Ranked among Athletics minor leaguers in RBI (74, 5th), hits (135, 7th), total bases (206, 8th), runs (69, T8th) and home runs (13, T8th) ... Rated as the No. 10 prospect in the Athletics organization by Baseball America.
Named a New York-Penn League Mid-Season All-Star. Started at shortstop in the game for the North Squad and was 0-for-3 in the game ... Stole a career-high 14 bases, ranking T8th among Athletics minor league players ... Ranked among New York-Penn League leaders in batting (.298, 6th), hits (75, T4th), doubles (17, T9th) and stolen bases (14, T10th) ... Posted a career-best 17-game hitting streak (7/20-8/6) with a .338 batting average (23-68), ranking as the 4th-longest streak in the league ... Hit first career multi-home run game vs. Cedar Rapids (5/23) with two solo shots ... Had a single-game high two stolen bases at Auburn (8/11) ... Led New York-Penn League shortstops with 41 double plays turned
Hit first professional home run at AZL Brewers (7/13) off Josh Uhen, a three-run shot.
Played 32 games his first professional season in the Dominican Summer League starting 22 games at shortstop while ranking second on the team with 22 RBI.