Question: Referee Hue Hollins was probed by the FBI over the 2007 NBA betting scandal involving a former referee that officiated how many regular season games during his career?
Sentence (from "Tim Donaghy"): Tim Donaghy ( ; born January 7, 1967) is a former professional basketball referee who worked in the National Basketball Association (NBA) for 13 seasons from 1994 to 2007.
Relevant evidence: No