Martinez's season debut will be pushed back to March 30 in Milwaukee due to a minor hamstring injury, Marc Topkin of the Tampa Bay Times reports.
He had been slated to start Saturday in St. Louis but instead till get a couple extra days of rest. It's unclear how long Martinez's hamstring has been bothering him, but it could partly explain why he was lit up for 18 runs over 7.2 innings in his final two Grapefruit League starts.