The White Sox optioned Nastrini to Triple-A Charlotte on Tuesday.

Interim manager Grady Sizemore said Saturday that Nastrini will be available in relief Monday in what's expected to be a bullpen day in the White Sox's series opener versus the Guardians, Daryl Van Schouwen of the Chicago Sun-Times reports.

Nastrini is scheduled to start Tuesday's game against the Orioles at Camden Yards, Roch Kubatko of MASNSports.com reports.

Nastrini (0-6)allowed one run on three hits and a walk over six innings Thursday, striking out three and taking a loss against the Rangers.

The White Sox recalled Nastrini from Triple-A Charlotte ahead of his scheduled start Thursday against the Rangers in Chicago.

Nastrini was optioned to Triple-A Charlotte on Sunday.

Nastrini (0-4) took the loss Monday against Toronto, allowing three earned runs on three hits and four walks over five innings. He struck out five.

The White Sox recalled Nastrini from Triple-A Charlotte on Wednesday, Daryl Van Schouwen of the Chicago Sun-Times reports.

The White Sox optioned Nastrini to Triple-A Charlotte on Monday.

Nastrini (0-2) allowed six runs (five earned) on six hits and five walks over three innings to take the loss Sunday against the Phillies. He struck out three.