He is known for roles on Days of Our Lives as Scott "Scotty" Banning II, Guiding Light as Alan-Michael Spaulding, The Young and the Restless as Matt Clark, The Bold and the Beautiful as Whipple "Whip" Jones III, and General Hospital as Ric Lansing.

He has appeared in Days of Our Lives (1989–1990) as Scott "Scotty" Banning II, Guiding Light (1990–1996) as Alan-Michael Spaulding and The Young and the Restless (2000–2001) as Matt Clark.

In January 2002, it was announced Hearst had joined the cast of The Bold and the Beautiful as Whip Jones; he made his first appearance on February 13 of the same year.

[5] In April 2009, Hearst was demoted to recurring status;[6] he remained in the role until the following month, when it was announced he would return to The Bold and the Beautiful.

[8] In January 2014, it was announced Hearst would reprise the role of Ric on General Hospital, returning during the February 24 episode.