Seth Lonsway

2026 season

GP

2

W-L

0-0

ERA

7.73

WHIP

3.00

K

2

IP

2.1

Game log

Latest news

• The Giants outrighted Lonsway to Triple-A Sacramento on Monday.

  Lonsway reached the majors for the first time this season, permitted three runs (two earned) over 2.1 innings. He held a 5.10 ERA and an ugly 61:59 K:BB over 95.1 innings in 2026 at the minor-league level. Lonsway is no longer on the 40-man roster but will stay in the organization.

  RotoWire via ESPN · 4d ago

• The Giants recalled Lonsway from Triple-A Sacramento on Saturday.

  Lonsway gave up three runs (two earned) over two innings during his MLB debut Aug. 29, but he'll get another opportunity to pitch for the big club as the team beefs up its bullpen depth down the stretch. Yunior Marte was optioned to Sacramento in a corresponding move.

  RotoWire via ESPN · Sep 26

• The Giants optioned Lonsway to Triple-A Sacramento following Game 1 of Saturday's doubleheader against the Diamondbacks.

  Lonsway was promoted from the minors ahead of Saturday's doubleheader and officially made his major-league debut in Game 1, when he allowed three runs (two earned) on five hits while striking out two batters across two frames. He'll head back down to Triple-A in order to make room on the active roster for Yunior Marte, who will start in the nightcap.

  RotoWire via ESPN · Aug 30

• The Giants selected Lonsway's contract from Triple-A Sacramento on Saturday.

  The Giants are down a couple of starters heading into Saturday's twin bill against Arizona, so Lonsway will come up from Triple-A to give San Francisco an arm capable of handling multiple innings as either a starter or long reliever. The 27-year-old owns a 6.00 ERA and 1.85 WHIP through 72 innings at Sacramento and will be making his MLB debut whenever he gets into a game. Spencer Bivens was optioned in a corresponding move.

  RotoWire via ESPN · Aug 29