In the month of August, Koronka was 2-0 with a stellar 1.32 ERA in 27.1 innings pitched--a span of four outings. He held left-handed hitters to a .231 average in 29 innings this season.
At Chicago, Koronka made three starts and was 1-2 with a 7.47 ERA and 19 hits allowed in 15.2 innings, striking out 10 and walking eight. The Clearwater, Fla., native joined the Cubs in August of 2003 when he was traded from Cincinnati for LHP Phil Norton. He was a 12th round draft pick by the Reds in 1998.
For his part, Soto hit .253 in 91 games behind the plate this season at Iowa. He recorded 18 extra base hits and 39 RBIs. Soto spent last season at Double-A West Tenn, batting .271 in 104 games.
Defensively this season, the 22-year-old was charged with 11 passed balls and had a .995 fielding percentage, committing four errors in 738 total chances. Soto contributed with 62 assists, the most by any catcher in the Pacific Coast League. He was an 11th round draft pick by the Cubs in 2001 out of San Juan, Puerto Rico.