Manager Joe Espada said Friday that Arrighetti (calf) will pitch out of the bullpen for the weekend series against the Guardians, Chandler Rome of The Athletic reports.
Arrighetti said after Sunday's game against the Angels that his calf started cramping during the sixth inning, Chandler Rome of The Athletic reports.
Arrighetti (5-11) allowed four runs on seven hits and two walks over 5.2 innings Friday, striking out five and taking a loss against the White Sox.
Arrighetti (4-9) allowed three runs on four hits and two walks while striking out eight over six innings to take the loss Sunday versus the Dodgers.
Arrighetti came away with a no-decision in Saturday's 2-1 extra-inning loss to the Rangers, allowing one run on two hits and three walks over six innings. He struck out seven.
Arrighetti allowed two runs on seven hits and two walks while striking out six over five innings in a no-decision versus the Twins on Sunday.
Arrighetti (4-6) picked up the win Wednesday, scattering three hits over seven scoreless innings in a 7-1 victory over the Rockies. He struck out 10 without walking a batter.
Arrighetti will draw the start in Saturday's matchup with the Tigers, Julia Morales of AT&T SportsNet Southwest reports.
Arrighetti (calf) said after Tuesday's 8-5 win over the Cardinals that he expects to make his next turn through the rotation, which is expected to fall Monday in San Francisco, Matt Kawahara of the Houston Chronicle reports. "It's not bad," Arrighetti said of his injury. "I think I'll be just fine."
Arrighetti (0-4) took the loss against the Yankees on Wednesday, pitching five innings during which he allowed five runs on eight hits and three walks while striking out four batters.