Arrighetti (foot) suffered an injury and was removed from his minor-league rehab start with Triple-A Buffalo in the third inning, Thomas Hall of The Jays Nation reports.
Urias was removed from Thursday's game against the Cubs due to right quad discomfort, Arden Zwelling of Sportsnet.ca reports.
The Red Sox released La Sorsa on Thursday.
Contreras (illness) is absent from the lineup for Thursday's game against the White Sox.
Urias was pulled from Thursday's game against the Cubs in the fourth inning with an apparent injury to his lower half, Shi Davidi of Sportsnet.ca reports.
Blue Jays manager John Schneider said Thursday that Yesavage has been diagnosed with meniscus damage in his left knee and will visit a specialist Monday, Shi Davidi of Sportsnet.ca reports.
Guerrero (hamstring) remains out of the lineup for Thursday's game versus the Cubs.
Sanchez went 1-for-3 with a walk and a two-run home run in Wednesday's extra-inning win over the Astros.
Lee recorded his first career big-league save Wednesday, giving up one unearned run on one hit in the 10th inning of a 5-4 win over the Astros. He didn't walk or strike out a batter.
Casas (abdomen/knee) underwent arthroscopic surgery on his left wrist Thursday.
