So if all five stay healthy through spring, then what becomes of the rest of the team's starting pitching depth, most notably the three young lefties Tim Cooney, Tyler Lyons and Marco Gonzales? Each of the three has had some level of big league exposure, but for various reasons hasn't yet stuck for the long term.
The Cardinals have expressed an interest in considering all three for a potential bullpen role, though given the current makeup of the bullpen, there likely wouldn't be room for more than one in the Opening Day 'pen.