San Francisco 49ers quarterback Brock Purdy (13) works on passing drills during the first day of training camp at SAP Performance Facility. Mandatory Credit: D. Ross Cameron-Imagn Images / D. Ross Cameron-Imagn Images

San Francisco 49ers podcast David Zizmor:

#1 San Francisco 49ers back up quarterback Mac Jones threw 14 of 18 passes with no interceptions. Jones threw for a bunch of completions including a 30 yard pass to Demarcus Robinson, a 20 yarder to Equanimeious St. Brown who ran a corner route. Jones’ performance is accurate and completed 77% of his passes in five practices.

#2 Wide receiver Rickey Pearsall was at practice for the second straight day. Pearsall at 11 on 11 drills caught two passes. Pearsall didn’t practice in the second half or in 1 on 1 drills. The 49ers are using Pearsall cautiously after his coming off a hamstring injury.

#3 Wide receiver Jauan Jennings who is suffering from a calf injury from the off season didn’t show up to practice on Sunday. Jennings was wondering if that was calf injury or an Achillies injury. Christian McCaffrey had a calf strain and it turned out to be Achillies tendonitis. The 49ers are being cautious about Jennings if it’s a calf or Achillies.

David Zizmor does the San Francisco 49ers podcasts Wednesdays at http://www.sportsradioservice.com