Lester Jesus Oliveros Blanco (born May 28, 1988) is a Venezuelan professional baseball relief pitcher for the Piratas de Campeche of the Mexican League. He has played in Major League Baseball (MLB) for the Detroit Tigers and Minnesota Twins. He is tall and he weighs . Career Detroit Tigers Oliveros began his professional career in 2006, playing for the VSL Marlins/Tigers. That season, he went 1–3 with a 2.72 ERA in 20 games (two starts), striking out 46 batters in innings. In 2007, he pitched for the VSL Tigers, going 2–0 with a 1.41 ERA in 27 relief appearances, striking out 59 batters in innings. He moved to the United States in 2008, splitting the season between the Oneonta Tigers (15 games) and Lakeland Flying Tigers (five games), going a combined 2–3 with a 2.59 ERA. He struck out 37 batters in innings of work. In 2009, he pitched for the Flying Tigers (34 games) and Toledo Mud Hens (one game), posting a 4–2 record with a 4.02 ERA. Despite his inflated ERA, he managed once again to average more than one strikeout per inning, with 61 strikeouts in 56 innings pitched. He split 2010 between the Flying Tigers and Erie SeaWolves, going a combined 1–3 with a 3.65 ERA in 44 games, striking out 60 batters in innings. Oliveros was called up to the Tigers on July 1, 2011, to replace the injured Al Alburquerque. Minnesota Twins On August 16, 2011, Oliveros was traded to the Minnesota Twins as the player to be named later in the earlier trade for Delmon Young. He was assigned to the Rochester Red Wings, the Minnesota Twins Triple-A affiliate. Between Detroit and Minnesota, Oliveros pitched in 19 games, recording a 4.64 ERA. In 2012, Oliveros spent the majority of the season split between Rochester and the Double-A New Britain Rock Cats, registering a 2-3 record and 2.42 ERA in 32 games between the two. He also appeared in just 1 game for the Twins, allowing one run in 1.2 innings of work. On December 1, 2012, Oliveros was non-tendered by Minnesota and re-signed to a minor league contract. In 2013, Oliveros was hurt for most of the season, appearing in just 6 games for the Rookie ball GCL Twins. Oliveros began the 2014 season with New Britain and also played for Rochester, posting a 4-3 record and stellar 1.64 ERA in 50 appearances