Cardinals' Arians optimistic Patrick Peterson will play Sunday vs. 49ers

Arizona Cardinals head coach Bruce Arians is optimistic about cornerback Patrick Peterson's status for Sunday's game against the San Francisco 49ers.

Peterson suffered a low-ankle sprain during Sunday's game against the Cincinnati Bengals after colliding with A.J. Green.

"Pat, I think's going to make it,” Arians said Tuesday on SiriusXM NFL Radio via ESPN's Josh Weinfuss. "He felt better today."

Peterson returned to elite form this season, after a mediocre 2014 campaign where he surrendered eight touchdowns.

If Peterson cannot play Sunday, expect Justin Bethel to gain increased playing time.