Matt Harvey (elbow) threw a 40-pitch bullpen session Sunday, mixing in a slider for the first time, Newsday reports.

Harvey threw a 40-pitch bullpen session Sunday, mixing in a slider for the first time since his Tommy John surgery, Newsday reports.

Analysis:

Harvey is expected to progress to throwing to hitters Thursday or Friday and has so far had no speed bumps in his return from Tommy John surgery. The debate as to how he will be used early in the season continues to rage on, but all indications to date are that he will be ready to go come Opening Day.