Frost, a second-year pro, was a college quarterback and is still learning to play safety.
He saw limited action in his rookie season, but had almost 600 yards receiving as a second-year pro.
First- and second-year pros were exempt from being selected in the draft.
"He did fine today," Kotite said of the second-year pro.
At 24, Wheatley is a second-year pro with 144 career carries for 479 yards.
Foley is a second-year pro who has only played in last season's final game.
"It's not my job to question the coach," the second-year pro said.
Dallas is now 17-0 in games when Smith, a second-year pro, makes 18 or more rushing attempts.
McGhee is a second-year pro and the others are rookies.
This season, that role seemed to have been reserved for his fellow second-year pro.