Jacob Isaiah Lopez was originally signed by Giants scout Charles Fick…attended College of the Canyons (Calif.) from 2017-18 and earned Western State Conference East Division Pitcher of the Year in 2018…committed to Texas Tech before he was selected by San Francisco in the 2018 draft.
2025
Was acquired from Tampa Bay with Jeffrey Springs during the offseason and went 7-7 with a 4.08 ERA and .721 opponents OPS in 21 games, including 17 starts, over three stints with the A’s after pitching in eight games over the previous two seasons with the Rays...Struck out 113 batters in 92.2 innings and his average of 10.97 strikeouts per nine innings was eighth highest in the Majors among pitchers with 90 or more innings pitched...did not have a wild pitch...Ranked seventh in the Majors among rookies in strikeouts, tied for eighth in wins and tied for 12th in games started...tied for third in most hit batters (eight)...Was 0-4 with a 7.20 ERA and .927 opponents OPS over his first seven games through June 8...then went 7-2 with a 2.17 ERA and .598 OPS over his next 13 starts from June 8 to Aug. 19 and had the third lowest ERA in the Majors over that span...allowed nine runs in two innings for the loss in his final start on Aug. 24 and missed the remainder of the season with a flexor strain in his left elbow...Had a .230 opponents batting average, which broke down to .216 (16-for-74) with a .612 opponents OPS against left-handed hitters and .234 (65-for-278) with a .750 OPS against right-handers...yielded 14 of his 15 home runs to right-handed hitters...has allowed 16 of his 17 career home runs to righties...Opponents hit .217 with runners in scoring position…they were 1-for-8 (.125) with a walk and six strikeouts with the bases loaded...As a starter, he had a .214 opponents batting average the first time through the lineup, .271 the second time and .143 the third time...Had a .099 opponents batting average with two strikes...Was 3-3 with a 2.64 ERA and .655 opponents OPS in nine games at home, 4-4 with a 5.40 ERA and .779 OPS in 12 games on the road...Had a 2-2 record and a 1.69 ERA in six interleague appearances…was 5-5 with a 5.05 ERA in 15 games against American League competition…was 0-3 with a 7.48 ERA in six games against the AL West...Pitched in relief in each of his first three appearances…17 of his final 18 outings were starts and in the one relief appearance, he tossed 4.1 innings in relief of an opener…was 7-6 with a 3.96 ERA and .698 OPS in 17 starts and 0-1 with a 5.19 ERA and .921 OPS in four relief appearances...Was 5-2 with a 3.19 ERA and .640 OPS in seven starts on exactly five days rest, 2-4 with a 4.56 ERA and .740 OPS in his other 10 starts...The A’s were 11-6 (.647) in his starting assignments…tossed five innings or fewer in 10 of his 17 starts…allowed one run or fewer in nine of his starts, including no runs six times...Also went 3-0 with a 2.33 ERA and .512 opponents OPS in six games, including four starts, with Las Vegas...Struck out 38 batters in 27.0 innings (12.67 per nine innings) and walked eight for a strikeout-to-walk ratio of 4.75...Had a .167 opponents batting average, including .145 (9-for-62) with a .490 OPS against right-handed pitchers and .206 (7-for-34) with a .552 OPS against left-handers...Opponents were 2-for-19 (.105) with runners in scoring position…they were 4-for-58 (.069) with two strikes, including 0-for-14 with 10 strikeouts on an 0-2 count.
2024
Spent most of the season at Triple-A Durham, where he was 4-7 with a 4.26 ERA and .671 opponents OPS in 21 games, including 19 starts...Also had three stints with Tampa Bay and compiled a 5.23 ERA and .629 OPS in four games, including one start...Held the opposition to a .135 batting average with the Rays but walked seven and hit two batters in 10.1 innings for a .304 on-base percentage...Right-handed hitters were 2-for-24 (.083) against him and left-handers were 3-for-13 (.231)...Both of the hits by righties were home runs...Opponents were 2-for-12 (.167) with runners in scoring position...Allowed a .218 opponents batting average with Durham but walked 45 batters in 88.2 innings for a .320 on-base percentage...His four wins matched his most as a Minor Leaguer, but his ERA, losses, runs (47) and home runs (12) were career highs...Ranked 10th in the Rays farm system in strikeouts (106) but tied for third in most walks...His opponents batting average broke down to .194 (24-for-124) with a .580 OPS against lefthanded hitters compared to .234 (47-for-201) with a .727 OPS against right-handers...Yielded nine of his 12 home runs to righties...Opponents hit .275 with runners in scoring position...Was 3-3 with a 3.27 ERA in 12 starts on four or five days of rest, 1-4 with a 5.88 ERA in his other nine appearances...Held the four, five and six hitters in the batting order to a .110 batting average, but the seven and eight hitters combined for a .359 average...Opponents hit .142 with two strikes...Logged five or more innings in just nine of his 19 starts and his season high was six innings three times.
2023
Made four appearances (one GS) in his first Major League season, going 1-0 with a 4.38 ERA (12.1IP, 6ER) and one save...Began the season with Double-A Montgomery and posted a 2.57 ERA (28.0IP, 8ER) across eight appearances (six GS)…Promoted to Triple-A Durham on May 23 and went on to make 18 starts for the Bulls, going 4-5 with a 2.72 ERA (79.1IP, 24ER)...Named Southern League Pitcher of the Week for the week of April 18-23…In two starts against Mississippi that week, he tossed 7.0 scoreless innings, allowing two hits while striking out 12 batters against one walk...On Aug. 14, had his contract selected from Durham and made his MLB debut later that day (SV, 3.0IP, 3H, 1ER, 2SO)…The California native made his debut and earned his first career save against the Giants, the team who originally drafted him in the 26th round of the 2018 First-Year Player Draft...Fanned Wade Meckler for the first strikeout of his career in his debut...Became the third Ray to record a save in his MLB debut, joining Braden Bristo (April 13, 2023 vs. BOS) and Dale Thayer (May 22, 2009 at FLA)...On Oct. 1 at TOR, made his first big league start and earned the win (5.0IP, 8H, 6R, 5ER, 2BB, 4 SO)...Rated as the No. 28 prospect in the Rays organization by Baseball America following the season.
