In 28 games (26 starts) during the 2007 season, the 25-year-old Munoz went 14-6 with a 3.57 ERA. He spent a majority of the season with Altoona, where he went 12-5 with a 3.63 ERA in 25 games (23 starts). Luis also went 2-1 with a 3.12 ERA in three starts with Triple-A Indianapolis.
Munoz led all Pittsburgh farmhands in wins, ranked second in ERA and third in strikeouts (105) in 2007; his 3.63 ERA with Altoona ranked ninth among Eastern League pitchers.
Signed as a non-drafted free agent out of the Dominican Republic in 2000, Munoz has posted a 37-25 record, one save and a 3.80 ERA (563.0ip/238er) in 125 career minor league games (84 starts).
Shortslef, 25, spent the entire 2007 campaign with Altoona and went 5-13 with a 4.40 ERA in 27 starts and a team-high 149.1 innings. He was a member of the Pirates 40-man roster the entire year and has gone 48-40 with 10 saves and a 4.31 ERA in 134 career appearances (106 starts) in the minor leagues. Shortslef was Pittsburgh's 6th round selection in the 2000 First-Year Player Draft.