Kevin’s mother, Terri, studied computer science and taught him basic programming concepts at a young age…He attended James Madison University to play baseball and study computer science…As part of a group project, he created a web application to improve the NCAA statistics website…After beginning his professional career with Cleveland, he returned to James Madison and graduated in Dec. 2019...Kevin experimented with a sidearm delivery when he was younger while throwing with his father, Mark…His dad encouraged him to show the lower arm angle in a game...Kelly played forward for the varsity soccer team at Paul VI Catholic (Va.) High School...Kevin and his wife, Sarah, were married this past offseason in Virginia…The two met while attending James Madison...Prior to the Rays final home game of the season, Kevin took the field for batting practice in a full Baker Mayfield Buccaneers uniform, complete with a helmet and shoulder pads, at the direction of his veteran teammates…Mayfield attended Game 2 of the Rays AL Wild Card Series donning a No. 49 Kevin Kelly Devil Rays jersey a couple of weeks later...Selected by Cleveland in the 19th round of the 2019 First-Year Player Draft out of James Madison University…Was 15-13 with a 3.37 ERA (189.2IP, 71ER) in 54 appearances (26GS) over three seasons...Anchored the James Madison pitching staff as a junior, leading the team with 94 SO while going 7-7 with a 3.26 ERA (88.1IP, 32ER) in 15 starts...Following his sophomore season, had a league-best 1.25 ERA (36 IP, 5ER) in 13 games (two GS) for the Orleans Firebirds in the Cape Cod League.
2025
Appeared in 41 games out of the bullpen in his third Major League season, all with the Rays… was on the injured list from April 10–May 29 with a left gluteal strain…optioned to Triple-A Durham Aug. 2, but was recalled Sept. 1 and remained with the Rays through the end of the season...Had a 25.1 scoreless inning streak between Aug. 9, 2024–March 29, 2025, which came to an end when COL Mickey Moniak took him deep in the right-hander’s second appearance of the season…marked the third-longest streak in club history behind Pete Fairbanks (29.2IP, 2023-24) and J.P. Howell (27.1IP, 2012)...Became the second pitcher in franchise history to make 40 relief appearances or more in each of their first three seasons in the majors, joining Colin Poche (2022-23, 2019)…is one of three MLB pitchers who debuted in 2023 to turn the trick, joining KC Lucas Erceg and SF Ryan Walker...Min. 35.0 IP, his 2.04 walks per 9 IP ranked fifth among AL relievers to HOU Bryan King (1.46), KC Taylor Clarke (1.46), SEA Gabe Speier (1.60) and TEX Chris Martin (1.70)…his career mark of 1.67 walks per 9 IP is the lowest in club history through a pitcher’s first three MLB seasons (min. 100.0IP), outpacing James Shields (1.85)...Opponents hit .220 (18-for-82) with a .390 slugging pct. against him in home games vs. .346 (27-for-78) and .731, respectively, on the road...Held opponents to a .090 (6-for-67) average in two-strike counts, ninth lowest in the AL (min. 50AB)…generated a career-best 27.5 pct. chase rate, including 32.7 pct. in two-strike counts...With two outs, opponents hit .369 (24-for-65) against him with eight HR, the second-highest such opp. average in the Majors (min. 50AB) to teammate Mason Montgomery (.373)…with one or zero outs, opponents batted .221 (21-for-95) with three HR...Surrendered 11 HR, surpassing his career total entering the year (9)…five came over his final eight outings…on the year, 18 of his 29 runs allowed (62.1%) were scored via long balls…four of the 11 HR tied the game or gave opponents a lead, including two walk-offs (July 4 at MIN & Sept. 25 at BAL)...Made his second career Opening Day roster, both with the Rays (also: 2023)...Over 11 appearances in June, spun a 2.45 ERA (11.0IP, 3ER) with nine SO and 0 BB…marked the first month of his career with 10 IP or more and no walks…was the first Rays pitcher to accomplish the feat since Ryan Thompson in July 2022...On July 21 vs. CWS, worked a pair of scoreless frames, setting down all six BF on 18 pitches… marked his first career scoreless, multi-inning outing on fewer than 20 pitches and the first by a Ray since Erasmo Ramírez (2.0IP, 14 pitches) on Aug. 26, 2024 at SEA…from that point on, he recorded a 9.60 ERA (15.0IP, 16ER) over his final 17 outings, raising his ERA from 3.65 to 5.90...On Sept. 2 vs. SEA, took the mound in the seventh inning with bases loaded and two outs, striking out Cal Raleigh on four pitches to maintain a 4-4 tie…remained in the game for the eighth frame and retired Julio Rodríguez, Josh Naylor and Eugenio Suárez en route to his first win since Sept. 22, 2024 vs. TOR.
2024
Went 5-2 with a 2.67 ERA (70.2IP, 21ER) and 0.96 WHIP in his second Major League season…had two stints on the Major League roster (April 9-18 & April 22–end of season)...Paced Rays relievers in innings and tied Garrett Cleavinger for the club lead in appearances (68)...Min. 70 IP, ranked among AL relievers in ground ball pct. (second, 55.8%), SO/BB ratio (second, 7.00), ERA (sixth), GIDP per 9 IP (seventh, 0.64) and WHIP (ninth)…generated 111 total ground balls, most among AL relievers...Min. 250 BF, his 3.2 pct. walk rate was second lowest among MLB relievers behind SF Tyler Rogers (2.1%)…under the same parameter, it was the lowest mark by a reliever in team history, surpassing Esteban Yan (4.2%) in 2001, and fourth lowest overall behind Zack Littell (2.5%) in 2023, Zach Eflin (2.8%) in 2023 and Corey Kluber (3%) in 2022...Ended the year on an active 24.1 scoreless inning streak, which began on Aug. 9…it marks the third-longest single-season streak in franchise history, trailing J.P. Howell (27.1, 2012) and Alex Cobb (24.2, 2014)…marks the fifth-longest streak overall, also trailing multi-season streaks by Pete Fairbanks (29.2, 2022-23) and Álex Torres (25.1, 2011-13)...Did not allow an earned run in 26 consecutive appearances to close the season, a streak that began on July 23…tied the 10th-longest season-ending streak in the Majors since earned runs became a statistic in 1913 and was the longest since HOU Bryan Abreu (27) in 2023…marked the longest stretch at any point in a single season in franchise history, besting the previous record held by J.P. Howell (24, 2012)…also marked the second-longest overall streak behind Pete Fairbanks (30, 2022-23)…only two pitchers had longer runs in all of 2024: ATL Raisel Iglesias (30) and PHI Matt Strahm (27)...Stranded 33 of 40 inherited runners…his 17.5 pct. IRS rate led the majors (min. 40IR), outpacing TOR Zach Pop (19.5%)…under the same parameter, it marked the second-lowest single-season figure in club history behind Randy Choate (15.8%) in 2009...Limited opponents to a .174 (12-for-69) clip on his sweeper, allowing just one extra-base hit (2B)...Recorded a 1.17 ERA (30.2IP, 4ER) after the All- Star break, third in the AL (min. 30.0IP) behind CLE Emmanuel Clase (0.30) and DET Tyler Holton (0.83)...In five appearances with Durham, threw 4.2 scoreless innings with eight strikeouts...Joins CLE Emmanuel Clase and DET Tyler Holton as the only AL relievers with a sub-3.00 ERA (2.88) and a WHIP below 1.00 (0.99) over the last two seasons from 2023-24 (min. 125.0IP).
2023
Made 57 appearances during his rookie campaign, going 5-2 with a 3.09 ERA (67.0IP, 23ER)…Was on the 15-day injured list from Aug. 16-Sept. 1 with a left ankle sprain...Voted the club’s Outstanding Rookie by the Tampa Bay Chapter of the BBWAA...Yielded only two HR over 67 IP, good for 0.27 HR/9.0 IP, the second-lowest mark in the Majors (min. 60 IP) behind DET Jason Foley (0.26)…Signaled the fifth-lowest mark in Rays history under the same parameter...His 57 appearances were eighth most by a rookie in Rays history, including the most since Ryne Stanek in 2018 (59G)...His 11 holds were tied for second-most among Rays relievers behind Colin Poche (22) and were fifth most by a rookie in club history…Also tied for fifth most among AL rookies...Posted a 1.77 ERA (35.2IP, seven ER) in 28 home appearances compared to a 4.60 ERA (31.1IP, 16ER) in 29 road appearances...Began the season with a 5.06 ERA (21.1IP, 12ER) in his first 15 appearances from April 1-May 12…Posted a 2.17 ERA (45.2IP, 11ER) in 42 games from May 14 on...Worked more than 1.0 IP in 24 of his 57 appearances…Recorded 10 relief appearances of 2.0+ IP, tying Yonny Chirinos and Cooper Criswell for the club lead and tying for seventh-most among AL rookies...Limited opponents to a .205 (46-for-224) average on his sinker/sweeper compared to .320 (8-for25) on his cutter...Recorded 10 HBP, the most among AL relievers and most by a reliever in Rays history...Began his career with 42.0 homerless innings, the second-longest such streak by a rookie in franchise history behind Álex Torres (42.2IP)…Saw the streak come to end on July 19 at TEX (Jonah Heim)...Made his first career Opening Day roster...On April 1 vs. DET, made his MLB debut, permitting an Austin Meadows RBI-single in the sixth inning before retiring the side in order in the seventh…Fanned his final batter faced, Nick Maton, for his first career strikeout...On April 13 vs. BOS, worked a career-high 2.2 IP, yielding one run on a Justin Turner RBI-single...On April 28 at CWS, earned his first career save after inducing a Luis Robert Jr. fly out…Became the 12th pitcher (16th instance) in Rays history to record a save on two pitches or fewer...Threw 20.1 scoreless innings spanning 21 appearances from May 14–July 15, holding opponents to a .092 (6-for-65) average during that span…It marked the second-longest such run by a rookie in club history, behind Álex Torres (25 IP; 2011-13)…The 21 consecutive scoreless outings tied the third-longest streak in Rays history, trailing Pete Fairbanks (30G) and J.P. Howell (24G)...On July 6 vs. PHI, collected a career-best four SO over 2 IP to preserve a 1-1 tie…Fanned Kyle Schwarber, Nick Castellanos and Bryce Harper in the sixth frame.
2022
Made 48 apps (one start) in the Minors in his last season in the Guardians organization…tied for 1st among Guardians minor leaguers in apps...Went 5-2 with a 2.04 ERA (57.1-IP, 13-ER) and 75 SO between Double-A Akron and Triple-A Columbus, earning a May 30 promotion...Yielded one HR against 251 BF between the two levels…held righties to a .157 avg. (23-for-147), while lefties hit .275 (19-for-69) against him...Struck out 28.9 pct. (43 of 149) of batters faced at the Triple-A level…according to Baseball America, had a 62.2 pct. ground ball rate after his promotion to Columbus...Selected by the Rockies with the No. 8 pick in the major league phase of the Rule 5 Draft and traded to the Rays for cash considerations...Ranked by Baseball America as the No. 27 prospect in the Rays system following the season.
2021
Spent the entire 2021 season with Class-A Lake County…tied for 2nd among Cleveland farmhands with 40 apps and ranked third with seven saves.
2020
In 2020, was not part of the Cleveland 60-man player pool and did not play following the cancellation of the minor league season.
2019
In 2019, began his professional career in the Arizona League…went 1-0 with a 2.08 ERA (17.1- IP, 4-ER) in 14 apps between two affiliates.
