He pitched for four teams: the Los Angeles Dodgers, Montreal Expos, New York Yankees, and Texas Rangers.

[1] Wetteland attended Cardinal Newman High School in Santa Rosa, California.

The New York Mets selected him in the 12th round of the 1984 MLB draft, but he opted not to sign, feeling he was not ready for a professional career.

[5] In 1988, Wetteland pitched for the San Antonio Missions of the Class AA Texas League.

[3] While playing in the Pacific Coast League, he garnered notice by earning 20 saves in 20 chances.

After the 1991 season, Wetteland was traded twice; first to the Cincinnati Reds with Tim Belcher for Eric Davis and Kip Gross in November,[6] and then to the Montreal Expos with Bill Risley for Dave Martinez, Scott Ruskin, and Willie Greene in December.

The Yankees allowed Wetteland to leave as a free agent due to the emergence of Mariano Rivera.

The surgery robbed him of some of his fastball speed, forcing him to expand his repertoire to include a slider, curveball, and change-up.

[12] He served in this position until after the end of the 2010 season, when new manager Eric Wedge replaced him with Triple-A Tacoma Rainiers pitching coach Jaime Navarro.

On May 18, 2007, Wetteland was introduced as an assistant baseball coach and bible teacher at Liberty Christian School in Argyle, Texas.

On November 12, 2009, Wetteland was hospitalized for what was originally said to be a "mental issue," in which a woman reported he was depressed and contemplating suicide.