Towers added that Phillips was currently three months into recovering from the anterior cruciate ligament reconstruction of his right knee and was already starting to develop his strength and power.

BBC: Henson will miss start of season

Rivera, the career saves leader, missed most of last season after tearing the anterior cruciate ligament in his right knee while tracking down a fly ball during batting practice in Kansas City on May 3.

WSJ: Rivera says Yankees will support Rodriguez

The star cornerback, sidelined most of last season after tearing the anterior cruciate ligament in his left knee, is shown running on a treadmill with a contraption on his upper body that relieves 30 pounds of pressure and doing a variety of drills in a segment on NFL Network that aired Thursday.

WSJ: Jets' Revis starts running as trade rumors persist