Diggs and Maye were joined by backup QB Josh Dobbs, starting running back Rhamondre Stevenson, veteran wideout Kendrick ...

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CBS Sports believes the 49ers have the ninth-best backup quarterback in the NFL this year.

The work comes as Maye, who now has veteran Joshua Dobbs and undrafted free agent Ben Woodbridge behind him on the depth chart, is also learning a new offense under coordinator Josh McDaniels.

Backup quarterback Joshua Dobbs also had a nice day, finishing 11-of-13. Rookie Ben Wooldridge finished 4-of-8 with an interception thrown to rookie safety Josh Minkins.

Rookie third-round pick Kyle Williams hauled in a 35-yard pass from backup quarterback Joshua Dobbs with an over-the-shoulder catch over cornerback Miles Battle, who had an eventful day.

Backup QB Joshua Dobbs completed 10 of his 16 throws during 11-on-11s with an interception — with cornerback Myles Battle snagging a ball that was initially dropped by John Jiles.

It took months for Avery to land his first client, Josh Dobbs, then a high schooler from Alpharetta, Ga., now an NFL quarterback and briefly a Vikings sensation.

The other two Patriots quarterbacks also struggled on Tuesday. Joshua Dobbs finished 7-of-13 and Ben Wooldridge completed 3-of-8 passes in full-team drills.

Joshua Dobbs was signed to a two-year, $8 million deal as a free agent to serve as his veteran mentor/support system.