Jarvis, known for his outrageous performance in Rock of Ages, will portray Coach Simons, "a combination of 'muscles and mustache with a twist of creepy,'" SVU casting director Jonathan Strauss told TVGuide.com. Jarvis will appear in the fifth episode of the season.
In addition to Jarvis, Rosie Perez (The Ritz, Reckless, Frankie and Johnny), Garret Dillahunt, Jim True-Frost (August: Osage County), Jessica Walter, Stephen Rea (Kicking a Dead Horse), Wentworth Miller and Eric McCormack will also guest star.
As previously reported, Emmy-winning actress Christine Lahti will play the assistant district attorney for the initial episodes of the season. Series regular Stephanie March will return as the assistant district attorney following Lahti's four-episode engagement.
"Law & Order: SVU" launches its new season Sept. 23 on NBC.