From the DDN

As feared, catcher Craig Tatum was diagnosed with a torn tendon in his right elbow and will soon undergo Tommy John surgery, ending his season. Tatum, the Reds’ No. 3 pick in last summer’s free agent draft, was hitting .188 with a homer and 12 RBIs when he hurt his arm in a game Sunday.
Catcher Chad Ziemendorf was called up from extended spring training, but since Evan Conley had already taken Tatum’s spot on the roster, second baseman Mayker Sandoval was sent to extended spring training to make room for Ziemendorf. Sandoval, who had done so well in spring training, was hitting .165 with no homers and 4 RBIs for the Dragons.
Ziemendorf was drafted in the 23rd round of the 2003 draft.

In case you missed it, former Dragons pitcher Justin Gillman, the Reds’ No. 2 draft pick in 2001, told the organization he wanted to retire and last week the Reds released him. Gillman, who had three different stays with the Dragons, has had repeated arm problems and surgeries.