From Scout.com:
The 49ers did not strike in the supplemental draft, but they were nearing a free-agent contract agreement with raw linebacker David Dixon, who failed to qualify academically for Kansas State after last playing for Hutchinson (Kan.) Community College. If Dixon has a good summer camp, he is expected to be a practice-squad candidate.
LB David Dixon expected to sign with 49ers - Friday, July 14, 2006; 49erswebzone.com