Thursday morning’s rush of rain measured in at 2 inches of precipitation at TPC Twin Cities in Blaine, site of this weekend’s 3M Championship golf tournament.

The course is thoroughly soaked, and that along with persistent lightning in the area caused tournament officials to alter Thursday’s pro-am schedule.

Many of golf’s biggest names on the 50-and-over circuit are still scheduled to play but rather than a uniform start players will be scattered.

The morning pro-am wave that includes players like Tom Lehman (Hole 8), Jay Haas (Hole 8), Bernhard Langer (Hole 9) and Mark O’Meara (Hole 1) has been cut to nine holes and will begin with an 11 a.m. shotgun start.

The afternoon wave is a 18-hole shotgun start at 2 p.m. that includes John Daly (Hole 10), Kenny Perry (Hole 1), Miguel Angel Jimenez (Hole 16) and Jesper Parnevik (Hole 6).

The pro-am is free for spectators, as is the 54-hole tournament that begins Friday morning.