Red Sox manager Alex Cora said Saturday that Crawford (knee) isn't certain to be ready to pitch by Opening Day, Chris Cotillo of MassLive.com reports.

Crawford (knee) threw a bullpen session Friday, Jen McCaffrey of The Athletic reports.

Crawford is behind schedule due to patellar tendon soreness, Chris Cotillo of MassLive.com reports.

The Red Sox and Crawford avoided arbitration by agreeing to a one-year, $2.75 million contract Thursday, Chris Cotillo of MassLive.com reports.

Crawford (9-16) took the loss Saturday against the Rays, allowing six runs on five hits and four walks over 4.1 innings while striking out six.

Crawford (9-15) earned the win in Game 2 of Sunday's doubleheader against the Twins. He allowed three runs on eight hits and no walks while striking out seven over 7.2 innings.

Crawford and the Red Sox won't face Minnesota on Saturday, as the game was postponed due to inclement weather, Betsy Helfand of the St. Paul Pioneer Press reports.

Crawford (8-13) took the loss Tuesday, giving up two runs on one hit and two walks over six innings as the Red Sox were downed 7-2 by the Mets. He struck out eight.

Crawford (8-12) took the loss against the Blue Jays on Thursday, allowing two runs on six hits and two walks over 6.2 innings while striking out three.

Crawford (8-9) picked up the win Tuesday, giving up four runs on three hits and a walk over 5.1 innings in a 9-4 victory over the Rangers. He struck out four.