Cardinals coach Bruce Arians indicated that Week 17 starting quarterback Logan Thomas was "shaky" at the beginning of Wednesday's practice but finished "pretty strong" as he developed an understanding of where to throw his passes, ESPN.com reports.
"He's worked, fundamentally, extremely hard and gotten much better," Arians said. "But putting those fundamentals to use in the offense, that's two totally different things."
Thomas has just three days of practice before facing the 49ers in a game that has the possibility of landing his team with a first-round bye with a win and help from other results.
"It wasn't the greatest, but as it went on, it got better and better," Thomas added. "It just comes with reps and comes with time."
The Cardinals are a 6-point underdog in San Francisco Sunday.