It’s fitting that the starting pitcher for Boston on MLB trade deadline day will be a new acquisition.

Or rather, reacquisition, as the Red Sox brought back veteran left-hander James Paxton via trade with the Los Angeles Dodgers last Friday.

“Big Maple” signed a one-year deal with a player option for a second year before the 2022 Red Sox season, but ended up missing the entire first year due to a combination of injuries. He last started for the Dodgers on July 21, when he pitched five innings of three-run ball against the Red Sox, issuing four walks and striking out seven.

Overall, the southpaw is 8-2 with a 4.43 ERA over 18 starts, with 48 walks and 64 strikeouts across 89.1 innings.

Jarren Duran CF

Wilyer Abreu RF

Masataka Yoshida DH

Rafael Devers 3B

Tyler O’Neill LF

Dom Smith 1B

Connor Wong C

David Hamilton 2B

Ceddanne Rafaela SS

Check back later for the Mariners lineup

RHP Luis Castillo vs. LHP James Paxton

When: 7:10 p.m. ET

Where: Fenway Park

TV (Blackout restrictions may apply): NESN, ROOTNW

Red Sox radio: WEEI 93.7 FM, WCCM 1490 AM (Spanish)

Mariners radio: KIRO 710