Forsman fired a 3-under 69, finishing at 15-under-par 201 after leading by as many as three strokes along the way in the season-opening event.
Jay Don Blake finished in second place with a bogey-free round of 5-under 67, sinking a birdie on the 18th to claim sole possession of the No. 2 spot.
Jeff Sluman (71) and Gary Hallberg (66) finished tied for fifth at 11-under 205.
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