Sherman's decision is not unexpected, considering he has repeatedly said that converted wide receiver Ryan Tannehill needed to decisively outplay Johnson to win the job.
"The way it all finished up, we have two No. 1s that I'm very excited about," Sherman told reporters after practice on Monday. "I believe in both of our quarterbacks and am equally happy with both. But the nod will go to Jerrod as our starter for the first ballgame and we'll go from there."
Sherman did say that Tannehill, who set A&M freshman records for receptions and receiving yardage last season, would remain at quarterback.
"Ryan's going to be a heck of a quarterback here," Sherman said. "Are there going to be some situations where he'll be on the field? Possibly. But right now, we're still focusing on the quarterback aspect of it."
Johnson, who's 6-foot-5 and 243 pounds, started the final 10 games at quarterback last season after seeing action at wide receiver to start the season. He passed for 2,435 yards, set a school record with 21 touchdown passes and had three or more TD passes in four games.
Tim Griffin covers college football for ESPN.com. Contact him at firstname.lastname@example.org.