After being lavished with praise by his coaches earlier in the day, receiver A.J. Jenkins turned in what may have been the catch of the day in the afternoon practice. Jenkins, who mostly was lined up opposite Anquan Boldin with the first-string offense, was running a crossing route on the pattern. The throw by second-string quarterback Colt McCoy was behind him, and Jenkins reached back and snagged the ball as he went to the ground. Both Jim Harbaugh and Greg Roman said that Jenkins had very strong practices last week, and he seems to have emerged as the early frontrunner to start opposite Boldin this season.