MMAJunkie.com: has the story:
Just days after an injury suffered in training forced Josh Koscheck (12-4 MMA, 10-4 UFC) out of a UFC 98 bout with Chris Wilson (14-5 MMA, 1-2 UFC), the organization has apparently secured a replacement.
MMAjunkie.com (www.mmajunkie.com) has learned from sources close to the bout that recent WEC import Brock Larson (25-2 MMA, 2-1 UFC) has agreed to fill in for Koscheck at the event. Wilson has also made a verbal commitment to the matchup, though bout agreements have yet to be finalized.
UFC 98 is scheduled for May 23 at the MGM Grand Garden Arena in Las Vegas.
Larson fought less than a week ago, earning an impressive first-round submission win over Jesse Sanders at UFC Fight Night 18. Currently riding a four-fight win streak, the bout was Larson's first bout in the UFC since a December 2006 unanimous-decision win over Keita Nakamura.