Purdy’s not “known” for throwing the back shoulder or out because he’s never had receivers who are adept enough or big enough to win contested throws along the sidelines. As for crossing routes over the middle he still has Piersal, Kittle, Kirk and McCaffrey out of the backfield for that. If the Niners revamped Oline can give Purdy time to step into his throw he’ll get the job done.
Since he has come into the league, he is no. 1 among all QBs in deep passes. In 2023 and 2024, he had more than double the completion percentage of Patrick Mahomes on deep passes. (I haven't seen the number this year, but he's been the same.)
While he was ranked no. 1 in deep passes, he was 17th in passes less than 10 yards. (That was 2023, not sure what it is now.)
Contrary to the perception, he threw checkdowns at the 2nd lowest rate in 2024. (Caleb Williams was no. 1. Haven't seen the numbers for 2025. He probably was coached to do it a little more in 2025, but it wasn't too much.)
McCaffrey was on pass for more than 1000 receiving yards when Purdy was injured, and Mac Jones was playing. He was also in the top 5 of receptions. But that slowed way down once Purdy returned. Not that he doesn't like throwing to McCaffrey, but he has a relentless desire to push the ball down the field.