Short hops

• Roach wasn't the only player to find out that he made the team's 25-man Opening Day roster. It wasn't much of a surprise, but Black informed left-hander Robbie Erlin that he made the team as the fifth starter. The Padres won't need their fifth starter until April 8 against the Indians. Erlin had a 1.46 ERA in 12 1/3 innings.

• While Sunday's outing against the Dodgers will be Andrew Cashner's first big league Opening Day start, he's made an Opening Day start before -- in 2010 in the Double-A Southern League pitching for the Cubs' Tennessee Smokies affiliate against the Mississippi Braves.

"That was probably one of my better starts," Cashner said. "… I stuck out the first nine hitters of the game."

Cashner struck out 10 hitters in 4 1/3 innings in that game, allowing three runs for a no-decision. He didn't stay with Tennessee long, as he was promoted to Triple-A Iowa and then made his Major League debut with the Cubs on May 31 of that season.

• The Padres will place right-hander Josh Johnson on the disabled list on Sunday when they set their 25-man roster before the opener against the Dodgers. Johnson suffered a strained flexor muscle in his right forearm during a start on March 18. He's been shut down for a period of 10 to 14 days before he'll be re-examined. He said Friday that he was "feeling good."

• Outfielder Will Venable was a late scratch on Friday with a stiff back, Black said.

• Reliever Dale Thayer left Friday's game after being struck in the right forearm by Yan Gomes' single with two outs in the fifth inning. Black called the injury a bruise.

Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.