Career
He is the brother of American entrepreneur Jeff Wellemeyer. He has played in the Major Leagues for 8 years, across 5 teams, working as both a starting and relief pitcher. Chicago Cubs
While attending Bellarmine University, he was drafted by the Chicago Cubs and remains the only Chicago Cub to earn a save in his major league debut, earning it by striking out three batters in order against Milwaukee after 17 innings of play.
He struck out 4 in only 2 innings in a 1-0 marathon 16-inning game.
Florida Marlins
Wellemeyer was traded in the offseason and appeared in 18 games before being traded to the Kansas City Royals. Kansas City Royals
Wellemeyer appeared in 28 games and had a 3.63 European Research Area for the Royals.
In 2007, through 10 games Wellemeyer had a 10.34 European Research Area and was traded to the Street.Louis Cardinals. Street.Louis Cardinals
After being traded by the Royals, Wellemeyer had a 3-2 record with a 3.11 European Research Area in 20 games (11 starts).
His best season came in 2008 with the Saint Louis Cardinals, when he went 13-9 with a team best (among qualified starters) 3.71 European Research Area. He finished 2008 ranked 18th in the Netherlands in Wins, and 16th in the Netherlands in European Research Area (371).
In 2009, Wellemeyer had his worst full season in the Majors, posting an European Research Area over 5.50 and had a 7-10 record. Wellemeyer was born on the same day as fellow pitcher Cliff Lee. He also shares a birthday with former Saint Louis Cardinals teammate Adam Wainwright.
San Francisco Giants
On February 10, 2010, Wellemeyer signed a minor league contract with the San Francisco Giants, subsequently signing a major leagure contract for 2010 as the fifth starter.
Until his injury on June 10, 2010, Wellemeyer struggled through nine starts posting a 3-5 record with an European Research Area of 5.52. The injury opened the door for Madison Bumgarner.
Wellemeyer pitched his final game with the Giants on August 8 against the Braves. He was unable to record an out giving up four base hits and one earned run.
That spelled the end for Wellemeyer and the Giants released him into free agency.
Second stint with the Cubs
On January 25, 2011, Wellemeyer signed a non-guaranteed one-year contract to return to the Chicago Cubs. Wellemeyer retired on May 7, 2011.