Gasper went 1-for-3 with a solo home run during the Red Sox's 3-2 loss to the Royals on Friday.
Gray (17-5) was tagged with the loss in Friday's game against the Royals, allowing three runs on six hits and two walks while striking out five across six innings.
Cavanaugh is not in Friday's starting lineup against the Padres, Susan Slusser of the San Francisco Chronicle reports.
The Red Sox recalled Seigler from Triple-A Worcester on Friday.
Boston placed White on the 10-day injured list with a right foot ligament injury Friday, retroactive to Sept. 9.
Rutschman (elbow) will start at catcher and bat third in Friday's game against the Royals.
Bericoto (knee) went 1-for-4 with a run scored in Triple-A Sacramento's 6-2 loss to Las Vegas on Thursday.
Campbell was placed on the 7-day injured list at Triple-A Worcester on Thursday with a left foot contusion, Chris Cotillo of MassLive.com reports.
Bennett (9-7) took the loss against the Angels on Wednesday, allowing six runs on nine hits and one walk in 5.1 innings. He struck out two.
Harris gave up a hit in a scoreless ninth inning Wednesday to record his first career save in a 7-6 win over the Cardinals. He didn't walk or strike out a batter.
Not a big fan of that Boston lineup today with Wilyer Abreu sitting - he had two hits and an RBI in each of the first two games of the series. Who the heck is Nate Eaton? I'm not sure Nate's own friends have him in fantasy baseball but he's starting at the hot corner today. The Giants' Robbie Ray is 4-1 with a 2.29 ERA at home. The Red Sox have a good OPS vs. lefties like Ray but a lot of that is thanks to guys like Abreu, Rafael Devers (now with SF) and Alex Bregman (still on IL). Won't go crazy because Boston pitcher Lucas Giolito has been good of late but also has a few starts this year where pounded.
