Former Cy Young winner Frank Viola will rejoin the New York Mets' Triple-A affiliate next Friday after recovering from open-heart surgery, ESPN.com reported Thursday.

Viola, 54, underwent the procedure on April 2 after a spring training physical detected an irregularity.

Viola had been slated to open the season as pitching coach for Las Vegas of the Pacific Coast League. He spent the previous three years in the organization as a Class A pitching coach.

Viola is due to represent the Mets at next Thursday's opening day of the draft in Secaucus, N.J., before rejoining Las Vegas.

Viola won the American League Cy Young Award in 1988 when he posted a 24-7 record for the Minnesota Twins.

Viola's three-year pitching stint with the Mets included a 20-win season in 1990. In eight years with the Twins, Viola logged 112 of his 176 career regular-season victories. The three-time All-Star's career highlights include being named World Series MVP in 1987 .

Viola retired as a pitcher at age 36 after six games with the Toronto Blue Jays in the 1996 season.