ANAHEIM -- The Angels bolstered their bullpen depth Saturday, claiming right-hander Hansel Robles from the Mets. Robles was optioned to Triple-A Salt Lake, but the Angels vacated a spot on their 40-man roster for him by transferring catcher Rene Rivera to the 60-day disabled list.
Robles, 27, logged a 5.03 ERA over 19 2/3 innings for the Mets this season before being designated for assignment on Friday. Robles, who possesses a mid-90s fastball, struck out 229 batters over 208 career innings (9.9 K/9) with the Mets, but he also surrendered 32 home runs over that span.
"Right now, he's in Triple-A," manager Mike Scioscia said. "We'll see what the next couple of days bring."
The Angels have been searching for arms to fill the gaps in the back end of their bullpen left by the injuries to Keynan Middleton, Blake Wood and Jim Johnson. They claimed right-hander Oliver Drake from the Indians last month, but he was designated for assignment after four shaky appearances.
On Friday, the Angels also recalled right-hander William McGuire, who was acquired from the Rangers in exchange for cash considerations on Tuesday. McGuire has yet to debut for the Angels, but he's already been designated for assignment twice this year.
Skaggs on track to return Monday
Left-hander Tyler Skaggs said he felt "really good" after completing a bullpen session Saturday. Skaggs, who was scratched from his scheduled start against the Blue Jays on Thursday with right hamstring tightness, is likely to fold back into the rotation on Monday, when the Angels face the Royals at Kauffman Stadium to make up for the April 15 game that was postponed due to inclement weather.
Right-hander Felix Pena will pitch Sunday against the Blue Jays in his second career MLB start.
Youth movement
With Ian Kinsler, Jose Pujols and Martin Maldonado receiving routine days off on Saturday, the Angels started five rookies against Toronto on Saturday: David Fletcher, Jose Briceno, Jose Fernandez, Michael Hermosillo and Jaime Barria.
Fletcher, who is 5-for-13 (.385) over his first six MLB games, batted leadoff and started at second base in place of Kinsler.

"He's a grinder," Scioscia said. "I think that he fits right in with the guys on our club. Nobody on our team gives an inch in the batter's box. Defensively, his head is in the game. He runs the bases well. He's athletic, so hopefully he'll get a chance to get on base for some of our guys in the middle of the lineup tonight."