Boldin suffered left ankle and knee injuries in the Cardinals' regular-season finale against Green Bay and was inactive for their 51-45 overtime victory over the Packers in the first round of the NFC playoffs Sunday.
Hayes suffered a right ankle injury on the first play of the playoff game but played with it the rest of the way.
Coach Ken Whisenhunt says both players are getting better but whether they play this weekend will be a game-day decision.
Steve Breaston started for Boldin on Sunday and had team highs with seven receptions for 125 yards. He also had a touchdown.
Veteran Monty Beisel, signed Nov. 24 as insurance, likely would start if Hayes in unavailable.