In television, Patrick is known for his portrayals of FBI Special Agent John Doggett in "The X-Files" and Colonel Tom Ryan in "The Unit", and has played ongoing roles in series such as "The Outer Limits", "The Sopranos", "Elvis", ', "Burn Notice", "Last Resort", "Sons of Anarchy", its spin-off "Mayans M.C.", and '. In 2014 he was cast in the role of DHS agent Cabe Gallo in the CBS drama series "Scorpion". He was also guest host on season two of "GunnyTime". In 2021, he also had a role in season 10 of "The Walking Dead".