Both were invited to spring training.
Estes, who made one start for the Padres last season, had Tommy
John surgery on his pitching elbow June 7 and was put on the 60-day
disabled list Aug. 25. He has pitched for seven teams during his
12-year career, including seven seasons with the San Francisco
Greene played in 61 games for the Giants last season, making 37
starts at catcher, and hit .289.