CHICAGO -- Keenyn Walker is close to becoming a member of the Chicago White Sox organization ... or at least that's what his Twitter post would indicate.

Walker, the White Sox's top pick in the 2011 First-Year Player, selected at No. 47 in Compensation Round A in return for Arizona's signing of free-agent reliever J.J. Putz, put forth the following social media message on Wednesday:

"Ya buddy! Finally becoming a part of the Chicago White Sox family!!"

A White Sox source told MLB.com nothing was official as of yet with Walker's signing. However, it could be at the stage of just needing a physical to bring Walker into the fold.

Currently playing in the Alaska Baseball League, the 20-year-old batted .402 (86-for-214) with 11 doubles, eight triples and four home runs as a sophomore for Central Arizona College this past season. Walker, a switch-hitting outfielder, added in 50 RBIs, 76 runs scored and 65 stolen bases in 68 attempts over 63 games in leading his team to the National Junior College Athletic Association championship game.

The Cubs and Phillies previously drafted Walker, but neither team could come to terms with him. During a conference call after his selection, Walker indicated how he wanted to begin his professional career with the White Sox.

"I definitely want to sign and start my career in pro ball, but another year in school won't hurt," Walker said. "It's really whatever to me, but I definitely want to sign."