49ers mailbag: Which veterans are on roster bubble?

San Francisco 49ers’ guard Jonathan Cooper (64) warms up during training camp at the teams’ practice facility in Santa Clara, Calif., on Tuesday, July 31, 2018. (Randy Vazquez/ Bay Area News Group)SANTA CLARA — Bon voyage, exhibition season. Don’t let the lowering-helmet rule hit you on the way out. Here are 49ers fans’ top questions heading into Thursday’s exhibition finale at home against the Los Angeles Chargers:

Not many veterans are left from the ShanaLynch purge to compete with younger bucks. Now, I wouldn’t bet on any of these shocking-not-shocking moves, but they would be:

Wide receiver: Pierre Garçon (Year 11) ditched in favor of Dante Pettis (Year 1) and Kendrick Bourne (Year 2).…