The D-backs outfielder, who is on the disabled list with valley fever, will appear on the ABC soap opera "General Hospital" on Wednesday. The show can be seen at 2 p.m. MST on Channel 15 in Phoenix.
Jackson shot his part of the episode in early May, when the D-backs were last in Los Angeles. He was not on the disabled list at the time and said he was embarrassed that the show is going to air while he is on the DL.
Jackson, 27, was asked to participate as part of an ESPN project in which athletes who had non-traditional majors were given the chance to work in the field they studied. ESPN cameras followed Jackson around while he was on the set.
"I had a real good time doing it," Jackson said. "It was a blast."
Jackson was reticent to reveal too much about the specifics of the appearance because it is a new character and plot line, but he will play a physical therapist in the episode and said he had about three lines in it.
Jackson's father, John, is an accomplished and well-respected theater actor who is probably best known for playing Admiral A.J. Chegwidden on the television series "JAG."
Despite that, John Jackson did not offer any advice to his son.
"He's very modest about his acting," Conor Jackson said.
Steve Gilbert is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.