Full name is William Harper Warren...Played four collegiate seasons (2018-21) at Southeastern Louisiana University, going 13-10 with two complete games, four saves, a 3.90 ERA (205.1IP, 89ER) and 193K in 53 games (30 starts)...as a senior in 2021, went 7-2 with two complete games and a 2.57 ERA (91.0IP, 26ER) and 95K in 14 starts, earning Southland All-Conference Team honors...Graduated from Jackson Prep (Miss.) H.S.
2025
In his first full Major League season, went 9-8 with a 4.44 ERA (162.1IP, 158H, 90R/80ER, 65BB, 171K, 22HR)…opponents batted .250/.320/.418 (158-for-631, 2 2H R); LH .266/.350/.436 (91-for-342,12 HR); RH .232/.283/.398 (67-for-289, 10HR)...Was tied for second in the Majors in starts (33, tied for first in AL)...also ranked eighth in the AL in K/9IP (9.48)...Among Major League rookies, ranked first in strikeouts, starts and innings pitched and was tied for fourth in wins (tied for third in AL)...Surrendered one-or-zero home runs in 29 of his 33 starts and did not allow a home run in 15 of those starts...his 29 starts of one-or-zero home runs allowed were tied for the fourth-most in the Majors (tied for first in AL)...Allowed 4H-or-fewer in 15 of his 33 starts...Allowed 3ER-or-fewer in 24 of his 33 starts, including 2ER-or-fewer in 22 of those starts...according to Elias, his 22 starts of 2ER-or-fewer were the second-most by a Yankees rookie in a single season, trailing only Stan Bahnsen (25GS in 1968)...Tossed five scoreless starts: 5.2IP on 5/20 vs. Texas, 6/12 at Kansas City and 7/8 vs. Seattle, and 5IP on 6/27 vs. the Athletics and 8/5 at Texas…according to Elias, his five scoreless starts were tied for the third-most by a Yankees rookie in a single season in franchise history, trailing only Russ Ford's eight such starts in 1910 and Luis Gil's six such starts in 2024 (Hippo Vaughn also had five such starts in 1910)...According to Elias, his 171K were tied with Luis Gil (171K in 2024) for the second-most by a Yankees rookie in a single season in franchise history, trailing only Russ Ford (209K in 1910)...Was just the third Yankees rookie to make at least 33 starts in a season, joining Stan Bahnsen (34GS in 1968) and Russ Ford (33GS in 1910)...was also the first Major League rookie to make at least 33 starts in a single season since 2009 (Nick Blackburn, 33GS with Minnesota in 2008)...In 16 starts at Yankee Stadium, went 7-4 with a 3.50 ERA (87.1IP, 71H, 36R/34ER, 34BB, 96K, 12HR)...allowed 3ER-or-fewer in 13 of those starts, including 2ER-or-fewer in 11 starts...Went 2-4 with a 5.52 ERA (75IP, 87H, 54R/46ER, 31BB, 75K, 10HR) in 17 starts on the road...allowed 2ER-orfewer in 11 of his 17 road starts...His 112K prior to the All-Star break were the third-most strikeouts by a rookie in franchise history (since the All-Star Game was established in 1933), trailing only Masahiro Tanaka (135K in 2014) and Luis Gil (118K in 2024)...Went 5-5 with a 3.94 ERA (105IP, 46ER) over his final 20 starts (6/12-9/26) after going 4-3 with a 5.34 ERA (57.1IP, 34ER) over his first 13 starts of the season (4/1-6/6)...allowed 2ER-or-fewer in 14 of his final 20 starts and one-or-zero ER in eight of those starts...Made his season debut on 4/1 vs. Arizona and did not record a decision despite allowing only 2R/ER in 5IP (1H, 4BB, 4K, 1HR)...allowed his only hit on a two-run HR to Corbin Carroll in the third inning...Earned his first Major League win on 4/12 vs. San Francisco after allowing only 2R/ER in 5IP (2H, 2BB, 6K, 1HR)…after allowing a two-run HR to Wilmer Flores in the second inning, retired his next 10 BF and 11 of his final 12BF (1BB)...Did not record a decision in the Yankees' 3-2 loss on 4/22 at Cleveland (5.0IP, 3H, 2R/ER, 1BB, 5K, 0HR)...after allowing a leadoff single to Steven Kwan in the first inning, did not allow a hit to his next 17BF (1BB)...Recorded at least 7K in five of his six starts in May, posting a 13.82 K/9IP ratio during that stretch...recorded 7K in five straight starts (5/4-25), matching the second-longest such streak by a Yankees starter age 25-or-younger in franchise history...trailed only Luis Severino's six-game streak from 8/17-9/15/17...during the month of May, ranked second among all Major League pitchers in K/9.0IP ratio (13.82, first in AL), third in strikeout rate (33.9%, second in AL) and was tied for third in strikeouts (43, second in AL)...Went 2-1 with a 2.70 ERA (26.2IP, 8ER) and 41K over a five-start span from 5/4-25...allowed 3ER-or-fewer in each of those five starts...allowed just 1HR to 113BF over that stretch...The Yankees went 13-6 in his 19 starts from 5/9-8/17...his 13 team wins over that span were tied with Boston's Lucas Giolito for the second-most in the Majors, trailing only Detroit's Tarik Skubal (14 team wins)...Allowed only 1R/ER over a career-high 7.1IP on 5/9 at the Athletics (1W, 4H, 1BB, 7K, 0HR)…retired 15 of his first 17BF (1H, 1BB)...Earned his third win of the season on 5/20 vs. Texas after recording 10K over 5.2 scoreless innings (5H, 1BB, 1WP)…was his first career double-digit strikeout game…also marked his first career scoreless start…at 25 years, 338 days, was the youngest Yankee to record double-digit strikeouts since Luis Severino recorded 10K on 8/31/18 vs. Detroit at the age of 24 years, 192 days...Tossed at least 6.0IP in consecutive starts for the first time in his career on 6/17 vs. Los Angeles-AL (6.0IP) and 6/22 vs. Baltimore (6.1IP)...Recorded a career-high 11K on 6/17 vs. Los Angeles-AL (L, 6IP, 6H, 3R/ER, 0BB, 0HR)…became the third Yankees rookie in franchise history to record at least 11K in a game without surrendering a walk, joining Chad Green (11K and 0BB on 8/15/16 vs. Toronto) and Stan Bahnsen (12K and 0BB on 8/1/68 at Boston)…is one of only two Yankees rookies in the last nine years (since 2017) to record at least 11K in a game, joining Luis Gil (14K on 5/18/24 vs. Chicago-AL)...Allowed 2R-or-fewer in seven consecutive home starts from 6/22-8/11, tied for the seventh-longest such streak by a Yankees starter in franchise history (excluding openers), trailing only Luis Severino (9GS from 9/27/17-6/16/18), Bob Shirley (9GS from 8/17/83-6/16/85), Adam Warren (8GS from 8/21/13-9/26/15), Orlando Hernández (8GS from 7/22/98-4/23/99), David Cone (8GS from 5/29-8/12/98) and Fritz Peterson (8GS from 5/29-9/10/73)…Chad Green had eight such starts as an opener from 6/11/17-8/12/19-G2…his seven-start streak was also tied for the fourth-longest by a Yankees starter at home in a single season, trailing only Severino (8GS from 4/14-6/16/18), Cone and Peterson...After allowing a career-high-tying 8R/ER on 7/2 at Toronto, went 4-4 with a 3.81 ERA (78.0IP, 33ER) over his final 15 starts (7/8-9/26)…allowed 2ER-or-fewer in 11 of those 15 starts, including one-or-zero ER in six of those starts...Went 2-1 with a 2.81 ERA (48.0IP, 42H, 21R/15ER, 7HR, 14BB, 41K) over nine starts from 7/25-9/9…allowed 2ER-or-fewer in eight of those starts...Allowed only 1R/ER in 6.0 innings on 7/30 vs. Tampa Bay (ND, 6H, 1BB, 4K, 0HR)...Earned his seventh win of the year on 8/11 vs. Minnesota after allowing only 2R/ER in 6.2IP (3H, 0BB, 7K, 2HR)…retired 17 of his first 18BF...Made his postseason debut in ALDS Game 2 at Toronto (4.2IP, 7H, 6R/ER, 1BB, 4K, 4HR, 1WP)...was on the Yankees' ALWCS roster but did not pitch...Following the season, was named to Baseball America's MLB All-Rookie Team.
2024
Saw his first Major League action with the Yankees, going 0-3 with a 10.32 ERA (22.2IP, 33H, 27R/26ER, 10BB, 29K, 5HR) in six games (five starts) over five stints with the club (7/30, 8/7, 8/14, 8/21-31, 9/28)...opponents batted .340/.404/.608 (33-for-97, 5HR); LH .349/.442/.581 (15-for-43, 2HR); RH .333/.368/.630 (18-for-54, 3HR)...Recorded at least 6K in three of his five starts...Made his Major League debut on 7/30 at Philadelphia and did not record a decision (5.1IP, 4H, 4ER, 2BB, 6K, 1HR, 1HP)...struck out Bryce Harper (swinging) in the first inning for his first Major League strikeout...retired 12 of his final 14 batters faced (1H, 1HP)...Recorded his first career loss on 8/7 vs. Los Angeles-AL-Game 2 after allowing a season-high 8R/ER in 4.1IP (8H, 3BB, 6K, 1HR)...Did not record a decision on 8/14 at Chicago-AL despite allowing only 2R/ER over 5.0IP (7H, 0BB, 5K, 1HR)...Made his fourth start on 8/24 vs. Colorado, recording the loss after allowing 6R/5ER over 3.0IP (7H, 1BB, 6K, 0HR, 2BK)...marked his shortest start of the season...Recorded the loss on 8/31 vs. St. Louis after allowing 4R/ER in 4.0IP (5H, 3BB, 3K, 1HR)...Made his first Major League relief appearance on 9/28 vs. Pittsburgh (1.0IP, 2H, 3R/ER, 1BB, 3K, 1HR)...Spent the majority of the season with Triple-A Scranton/Wilkes-Barre, going 6-5 with a 5.91 ERA (109.2IP, 114H, 79R/72ER, 39BB, 136K, 19HR) in 23 starts...was tied for fourth among Yankees Minor Leaguers in strikeouts...Over his final 13 starts with the RailRiders from 6/1-9/18, allowed 3ER-or-fewer in 10 of his 13 starts, 2ER-or-fewer in nine of those starts and one-or-zero earned runs in six starts...posted a 2.91 ERA (21.2IP, 14H, 9R/7ER, 6BB, 30K, 2HR) in four starts with Scranton/Wilkes-Barre during the month of July...Following the season, was tabbed by Baseball America as the Yankees’ No. 8 prospect...was also labeled by the publication as having the "Best Control" and "Best Slider" among Yankees farmhands.
2023
Went 10-4 with a 3.35 ERA (129.0IP, 109H, 60R/48ER, 59BB, 149K, 15HR) in 27 combined games (25 starts) with Double-A Somerset and Triple-A Scranton/Wilkes-Barre…among qualified Yankees farmhands, ranked third in wins and winning percentage (.714), fourth in games started, fifth in ERA, strikeouts and innings pitched, sixth in opponents’ BA (.226) and eighth in WHIP (1.30)…began the season with Somerset, going 3-0 with a 2.45 ERA (29.1IP, 26H, 10R/8ER, 12BB, 39K, 0HR) in six starts…was promoted to Scranton/ Wilkes-Barre on 5/17, going 7-4 with a 3.61 ERA (99.2IP, 83H, 50R/40ER, 47BB, 110K, 15HR) in 21 games (19 starts)…was named the International League “Pitcher of the Month” in September with Scranton/Wilkes-Barre after going 1-0 with a 0.63 ERA (28.2IP, 15H, 2ER, 11BB, 36K, 0HR) in five games (three starts)…following the season, was tabbed by Baseball America as the Yankees’ No. 9 prospect…was also labeled by the publication as having the “Best Control” among Yankees farmhands.
2022
In his first professional season, went 9-9 with a 3.91 ERA (129.0IP, 119H, 70R/56ER, 42BB, 125K, 10HR) in 26 starts with High-A Hudson Valley and Double-A Somerset…ranked second among Yankees farmhands in games started, fourth in innings pitched, tied for fourth in wins, seventh in strikeouts, ninth in WHIP (1.25) and 10th in ERA…went 2-3 with a 3.60 ERA (35.0IP, 14ER) and 42K in eight starts with Hudson Valley before being promoted to Somerset on 5/28…was named the Eastern League “Pitcher of the Week” from 7/4-10 after allowing just three hits over 7.0 scoreless innings on 7/7 vs. Bowie (5K)…in 18 starts with the Patriots, went 7-6 with a 4.02 ERA (94.0IP, 42ER) and 83K… following the season, was ranked by Baseball America as the Yankees’ No. 7 prospect, as well as labeled as having the “Best Slider” among Yankees farmhands.
