49ers mailbag: Can Kittle pass up playing against his childhood Bears?

SANTA CLARA — Season’s greetings and thank you for the 49ers social-media queries that filled this Week 17 mailbag:

Should the 49ers try to get Gronk out of retirement if Kittle can’t go Sunday night or the following week? (@SFG_soccer)

Don’t disrespect Jake Tonges like that. Did you not see his touchdown catch last game? Eh, neither did Kyle Shanahan, who didn’t have time to challenge a call that could have given Tonges his fourth TD, and it was moot once Christian McCaffrey scored on the next quick-snap play.