Al Unser, Jr. clinched the 1988 International Race of Champions title by winning the final event of the four-race series Saturday at Watkins Glen International with an average speed of 110.924 mph.

Unser, an Indy car regular from Albuquerque, N.M., led the 30-lap event from start to finish and won $211,900 for claiming his second IROC title. His first title came in 1986. Finishing second behind Unser in both the race and the season standings was Terry Labonte of Archdale, N.C. Third was Scott Pruett of Roseville, Calif.

Unser, 26, started from the outside of the front row and took the lead from pole sitter Geoff Bodine from the first, never surrendering his advantage.

Unser started from the same position in last year's IROC event at the historic 2.4 mile road course. But Bodine got the lead at the start, which Unser claimed Bodine had jumped.

Bodine, of Julian, N.C., fell from second to sixth after a spin at the first turn on lap 11 and was forced to retire after he hit the barrier at the end of the back straight.

The crash severely damaged Bodine's car and IROC organizers deemed the vehicle too badly damaged to continue.

Bodine was credited with finishing last in the race. He dropped from first in points to sixth.

Unser crossed the finish line 1.58 seconds ahead of Labonte. Labonte's second place was worth $95,000, while Pruett, who won the Riverside IROC, charged from sixth to finish third and take home a $72,500 check. Unser is automatically invited to next year's race series.