Garoppolo has started 64 NFL games, with a 43-21 record. He has thrown 96 touchdowns to 52 interceptions, and he's got a 67.4% completion percentage. All told, he spent three seasons in New England, six in San Francisco, one with the Raiders and last year with the Rams.

Matthew Stafford will go through another lengthy workout Saturday to test his injured back before the Los Angeles Rams' second preseason game. Coach Sean McVay said the 37-year-old quarterback will do much the same workout he did last Saturday before the Rams beat the Dallas Cowboys at SoFi Stadium.

Rams quarterback Matthew Stafford, who has not practiced during training camp because of an aggravated disk in his back, will work out Saturday morning.