Jeffrey signed for the minimum $1,000 after the Rangers selected the senior pitcher in the 30th round of the 2015 Amateur Draft…he worked multiple part-time jobs during the minor league offseasons, including pitching lessons, landscaping and at the YMCA, where he used his employment for a free gym membership...Jeffrey’s major league debut came on July 31, 2018, and he assumed he had been traded when he received a 2 p.m. call from the Rangers director of minor league operations…instead, he was informed of his call up and made it to the airport in time to debut that night in a 6:40 p.m. game...He grew up a Red Sox fan and enjoyed watching Pedro Martínez and Jason Varitek…his mother sent him a picture of a Red Sox keychain and gym bag she found in his room after he was traded from Texas to Boston in January 2020...He married Kristyn on Dec 1, 2018.
Acquired by the Red Sox prior to spring training and made 16 apps over two stints in the majors… was on the active roster from Opening Day–Aug 10 and Aug 22–Sep 25…marked his second consecutive Opening Day roster...Pitched to a 3.86 ERA (11.2-IP, 5-ER) with 18 SO in his final 10 apps of the season...Recorded 4 outs (or more) in seven of 16 apps… went a season-high-tying 2 IP four times...Min. 20 IP, led the team with a 12.39 SO/9 IP ratio...On July 27 vs. NYM, made his Red Sox debut and allowed 5 runs in 1.1 IP, including 2-run homers by Pete Alonso and Dominic Smith.
Missed more than 2 months of the season on the injured list, making 25 relief appearances over 3 stints with TEX and pitching in 6 games for Triple-A Nashville...Opened the season with the Rangers, pitching in 9 games before being optioned to Nashville on 4/26...Recalled by TEX on 5/15 and placed on the 10-day injured list on 6/17 (left biceps tendinitis)...Transferred to the 60-day IL on 6/28...Made 2 rehab appearances with the AZL Rangers and 1 with Nashville before being activated on 9/1...Pitched in 5 more games for the Rangers...Closed his season with 2.0 perfect innings of relief vs. BOS on 9/24.
Entered the year having never pitched above High-A, but spent just 4 months with Frisco (AA) and Round Rock (AAA) before his promotion to Texas on 7/31…only staff members with a lower ERA than Springs' 3.38 figure after his contract was purchased on 7/31 (min. 15.0 IP) were José Leclerc (0.00) and Mike Minor (2.89)…posted 9 scoreless outings of 2.0+ IP, T4thmost in the A.L...went 0-for-1 in save tries, had 4 games finished, 2 holds, and permitted 5 of 7 inherited runners to score…posted 5.0 SHO IP in 2 starts and had 4.00 ERA (12 ER/27.0 IP) in 16 relief outings…1st batters faced hit .286 (4-14) with 2 BB.
Led all Texas farmhands and finished 2nd in the Carolina League with 146 strikeouts…whiffed 30.9% of all batters faced (146 of 472) and averaged 11.7 SO/9, 6th-highest among all full season pitchers (min. 100.0 IP)…held opponents to a .245/.311/.396/.708 slash line overall…was 1-8, 4.60 (46 ER/90.0 IP) over 17 starts and had 22.1 scoreless innings over 14 relief appearances…began the season in the Wood Ducks rotation and allowed 2-or-fewer runs in 9 of 17 starts…had 3 outings of 10+ strikeouts…shifted to the bullpen on 7/26 and held opponents to a .173/.230/.210/.440 slash line over 14 appearances…ended the season with 25.1-inning scoreless streak over his last 15 G/14 GS…had 2 scoreless innings over 2 relief appearances in the CL playoffs.
Was a South Atlantic League All-Star at Hickory and earned a mid-season promotion to High Desert…opponents batted .216 (63-292), including .203 (41-202) by right-handed hitters…began the season in the Hickory bullpen and had a 0.61 WHIP and .106 opp. avg. in 18 relief appearances…compiled a 0.47 ERA (1 ER/19.1 IP) in 1st 12 relief outings…permitted season relief-high 4 runs (3 ER) on 5/27 vs. GBO, but had 9.1 inning scoreless streak over next 5 appearances before promotion on 6/23…opponents were 1-for-29 during scoreless streak…tossed 6.2 scoreless innings in 1st 3 outings with High Desert…made spot start on 7/6 at BAK (3.0 IP, 3 ER) and final relief appearance of season on 7/10 vs. RC (2.2 IP, 2 R)… joined rotation for remainder of the season on 7/16 and went 0-2, 5.95 (24 ER/36.1 IP) in 8 starts...had a 4.26 ERA (3 ER/6.1 IP) with 12 strikeouts and one walk over 2 games/one start in the postseason.
Averaged 11.3 SO/9 and reached Low-A in first professional season…combined to go 2-2, 2.61 (9 ER/31.0 IP) with 39 strikeouts in 17 relief outings with Spokane and Hickory.