"We'll mix and match over at third," Black said. "It's good for those guys. It will be great for those guys to get exposed to third base. They'll get some [at-bats], some playing time.
"We know what Chase can do. Here in the short term, it will be good to get those guys exposed. They are up for it."
Headley injured his calf Saturday during an infield rundown drill. He was on crutches as a precaution to keep some of the weight off his calf. He said Sunday morning that the calf was sore. He was scheduled to have an MRI exam Monday.
"It's going to be beyond two weeks," Black said.
Of the available players, Gonzalez has played the most at third base (81 games, 48 starts) over his Major League career. Amarista has played 10 big league games at the position, and Jackson, who is considered an above-average defender at shortstop, played three games at third base in 2013 for the Cardinals. Peterson is a shortstop by trade as well.
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.