Bell's turn in the rotation would have been Tuesday when the Angels open a three-game set in Cleveland, but because of Monday's off-day Scott Kazmir is able to slot in, with Jered Weaver and Ervin Santana tentatively behind him. What day Pineiro ends up returning is variable, depending on how he feels after throwing 75 to 80 pitches in a rehab start for Class A Rancho Cucamonga on Sunday.
"Trevor's going to help us out of the 'pen right now and then we'll see if he gets folded back in the rotation," manager Mike Scioscia said. "See where Joel is and how much length Joel has. So there's some things to consider, but we'll reshuffle some things."
Bell, 23, is 2-5 with a 4.72 ERA in 25 appearances, seven starts. Pineiro, out since the end of July with a strained left oblique, is 10-7 with a 4.18 ERA in 20 starts.
Pineiro isn't the only Major Leaguer to appear in the California League playoffs: the Padres' Chris Young was slated to pitch for Lake Elsinore against Rancho Cucamonga on Saturday.
Reliever Scot Shields was still bothered by tightness in his right (throwing) elbow and was unavailable for a third straight game.