Felipe signed a minor-league contract with the Angels on Wednesday, Taylor Blake Ward of TheSportingTribune.com reports.

The Athletics designated Felipe (elbow) for assignment Saturday, Martin Gallegos of MLB.com reports.

The A's announced Thursday that Felipe will undergo Tommy John surgery, Martin Gallegos of MLB.com reports.

Felipe was placed on the 15-day injured list Tuesday with a sprained right elbow, Martin Gallegos of MLB.comreports.

Felipe (1-1) took the loss against the Cardinals on Monday despite also being credited with his fourth hold, allowing three earned runs on three walks over one-third of an inning. He struck out one.

Felipe was activated from the paternity leave list Tuesday.

Felipe was placed on the paternity list Saturday.

Felipe (1-0) earned the win in Wednesday's 6-5 win over the Red Sox, striking out two over 1.2 hitless innings.

Felipe was recalled from Triple-A Las Vegas on Friday, Martin Gallegos of MLB.com reports.

Oakland claimed Felipe off waivers from the Padres on Wednesday and sent him to Triple-A Las Vegas.