Career
He has played in Major League Baseball (MLB) for the Houston Astros and Colorado Rockies. López signed with the New York Yankees in 2002. He played in their minor league system until he was released in 2007.
He signed with the San Diego Padres two days later.
In 2007, López played for the Fort Wayne Wizards and Lake Elsinore Storm, going 1–0 with a 3.30 European Research Area in 22 games for the former and 2–1 with a 6.10 European Research Area in 22 games for the latter. He played for the Storm, San Antonio Missions and Portland Beavers in 2008, going 2–1 with a 2.64 European Research Area in 30 games with the Storm, 0–2 with a 4.93 European Research Area in 27 games with the Missions, and 0–0 with a 9.00 European Research Area in one game with the Beavers.
Houston Astros
On April 10, 2009, López was selected off waivers by the Houston Astros from the Padres. López served as the team"s closer in 2012 after Brett Myers was traded to the Chicago White Sox.
Colorado Rockies
He was designated for assignment on June 9, 2014.
He was re-added to the roster on June 21. In October 2014, Lopez elected free agency. Toronto Blue Jays
López signed a minor league deal with the Toronto Blue Jays on December 12, 2014.
He was released on June 30.