McRoy followed up his second-round 64 with a Saturday 65 to take a four-shot lead into the final round of the season finale.
First-round leader Michael Muehr is McRoy's closest pursuant at 9-under-par. Briny Baird, John Kernohan and second-round leader Donnie Hammond are all five shots off the lead at 8-under.
McRoy is currently eighth on the money list. With the top 15 following the end of Sunday's play earning their 2001 PGA Tour cards, McRoy has secured his playing privileges for next season. However, McRoy, who resides in Huntsville, Ala., just five hours north of the tournament venue in Dothan, has plenty to play for in the final round.
'There's only one spot out here that matters,' said McRoy, a University of Alabama graduate. 'It sure would be nice to finish first and not have to worry about whether or not you'll get into any tournaments next year. No. 1 and you can set your own schedule knowing you'll get in.'
McRoy could move into first place on the season-ending money list with a winner's check of $99,000.
Baird could also move into the No. 1 spot with a victory this week. Baird currently stands in sixth place on the money list. On the other hand, Muehr, Kernohan and Hammond are all trying to sneak their way into the top 15.
Muehr is 36th in earnings and needs at least a second-place finish this week to have a chance to move into the top 15. Kernohan and Hammond are in 27th and 28th place, respectively, and both need to finish in the top three.