The Brett Myers trade is now complete, and RHP Chris Devenski is the PTBNL. He was Chicago's 25th round selection last year out of Cal State Fullerton and didn't sign until August, hence his PTBNL status in this deal, as it hadn't yet been a year since his signing until now.
Devenski, 21, is a 6'3", 195 lb. starter/reliever who has spent the season with the Class A Kannapolis Intimidators. He's 6-5 with a 4.23 ERA, 7.9 K/9 in 61.2 IP over 19 games (8 starts) this year, but looking at his MiLB.com stats page, it appears he was moved from the bullpen to the rotation on June 25. He has a 3.92 ERA as a starter since then, including a 7 IP / 3 H / 1 R performance in his most recent start on July 31.
He will report to Class A Lexington.