Considering his speed and avoid fumble are high and Smirt got some quality output with a CB with similar ratings....its not a bad depth move for rushing.
Plus being 11-0 with a 350-50 points scored ratio and your advanced gameplanning skills.....you should be alright until the playoffs since 13 wins probably secures a bye.
The only way I survive in this game is depth so I'm not relying on one player to carry the load on offense...it may benefit your team in the long run getting more out of others on the roster....RB Frost looks like he could be special.