The Pittsburgh Pirates drafted Welker in the second round, with the 68th overall selection, of the 2007 Major League Baseball Draft.[1] He signed with the team on June 17, 2007.[3] The Pirates initially planned to keep Welker as a starting pitcher.[4] He struggled in his first professional seasons,[5] before achieving better results.[1] Welker was added to the Pirates' 40 man roster to protect him from the Rule 5 draft after the 2011 season.[6]
Welker was called up by the Pirates from the Triple-A Indianapolis Indians on May 8, 2013.[7] He was optioned back to Indianapolis on May 11.[8] Welker was called up again on June 20,[9] and made his major league debut three days later, against the Los Angeles Angels, pitching a scoreless eighth inning in relief.[10] He threw 1 1/3 scoreless innings in all for the Pirates before being optioned back to the minors. He maintained a 3-4 record plus a 3.25 ERA in 61 innings (41 games) with 9 saves and 64 strikeouts while in their AAA affiliate.[11]
On August 31, Welker was announced as the probable player to be named later traded to the Twins (along with Alex Presley) for Justin Morneau.[12] Because Welker was on the Pirates' 40-man roster, he was not officially traded to the Twins until October 5.[13] On November 19, Welker was traded back to the Pirates in exchange for LHP Kris Johnson.[14]
Welker had Tommy John surgery on June 5, 2014.[15] He was released by the Pirates on July 14, 2014.
On April 15, 2016, Welker signed a minor league deal with the San Francisco Giants. He was released on August 2, 2016.
Scouting report
Welker's fastball can reach 96 miles per hour (154 km/h).[1]