His roles include the title roles in Attila, Le Nozze di Figaro, Bluebeard’s Castle, Don Quixotte, Attila, and Aleko; Zaccaria in Nabucco, Bertram in Roberto le Diable, Raimondo in Lucia di Lammermoor, Colline in La Bohème, Don Alfonso in Lucrezia Borgia, Don Basilio in Il barbiere di Siviglia, Alidoro in La Cenerentola, Giorgio in I puritani, Banquo in Macbeth, Garibaldo in Rodelinda, Méphistophélès in both Faust and La Damnation de Faust, the Four Villains in Les Contes d’Hoffmann, Escamillo in Carmen, Marke in Tristan und Isolde, Caspar in Der Freischutz, Nick Shadow in The Rake’s Progress, Collatinus in The Rape of Lucretia, and King René in Iolanta.

Mr. Relyea also remains in high demand throughout the concert world where he appears regularly with orchestras such as the Chicago Symphony Orchestra, Cleveland Orchestra, Philadelphia Orchestra, Boston Symphony Orchestra, New York Philharmonic, Pittsburgh Symphony, Atlanta Symphony Orchestra,  Swedish Radio Symphony Orchestra, Scottish Chamber Orchestra, the Philharmonia Orchestra, and the Berlin Philharmonic. 

He has also appeared at the Tanglewood, Ravinia, Blossom, Cincinnati May, Vail, Lanaudière, Salzburg, Edinburgh, Lucerne and Mostly Mozart festivals, and in the BBC Proms.