The Orioles will need a starter to pitch Saturday against the Angels, but Showalter said it is possible the spot start could come Friday and Friday's scheduled starter, Miguel Gonzalez, could be pushed back to Saturday to get an extra day of rest. Showalter was non-committal about who will make the spot start, but it's likely someone in the minors — Freddy Garcia, Jair Jurrjens or Jake Arrieta — will get the call. … Catcher Chris Snyder, whom the Orioles acquired in a minor league trade Sunday with the Los Angeles Angels, was placed on the 40-man and 25-man rosters Tuesday. He will start his first Orioles game on Friday or Saturday. … Catcher Luis Exposito, who was recalled Sunday when Teagarden was placed on the DL, was designated for assignment Tuesday. The club has 10 days to trade, release or ask waivers on the 26-year-old. Showalter said the Orioles hope Exposito remains in the organization, but the club has contingency plans if he doesn't. … Second baseman Brian Roberts (hamstring) threw from 75 feet and took soft toss on Tuesday as part of his progression back to baseball activities. He has been on the 15-day disabled list since April 5, but Showalter said he is showing enough improvement that moving him to the 60-day disabled list to create more roster space does not appear to be an option. … Luis Ayala, whom the Orioles traded to Atlanta this month, was placed on the Braves' disabled list with an anxiety disorder. … Former Oriole Corey Patterson, who had been out of baseball, signed a minor league deal with the Mariners and was sent to extended spring.