They're dropping like flies at the Arnold Palmer Invitational at Bay Hill, as Justin Rose and Ernie Els have withdrawn from the field.

Both sited fatigue as their reason for WDing from Arnie's event. 

Instead of Sean O'Hair putting his feet up and relaxing after his second win of his career yesterday at the PODS Championship, he went right back to work this morning.

O'Hair and 25 others are playing in the Monday pro-am at the Arnold Palmer Invitational. With a 9 a.m. shotgun shot, O'Hair went off the 15th hole with a group that includes John Daly, Steve Lowery, Tom Lehman and Todd Hamilton.

Looks like Augusta National Golf Club is preserving one of its most commonly discussed and anachronistic traditions: changing the golf course. Nothing dramatic has been done to the course; it still measures 7,445 yards, par-72. But players will notice a few little tweaks. They include: Ten yards added to front of first tee, to allow for a northwest wind that makes the hole almost unreachable in two; greens changed at Nos. 7 and 9 for agronomic reasons and softening to allow for better pin placements in certain areas; the replacement of grass with pine straw down the left side of the par-5 15th and between 15 and 17. Not exactly earth-shattering, but the finish got a little more tricky on two of the last four holes. Intrigue ... the Masters never has a shortage of it.

A normal Thursday morning on the PGA Tour driving range has guys talking amongst themselves and joking with each other. The atmosphere is clearly friendly — loose and relaxed.

In match play — such as this week at the WGC-Accenture Match Play Championship — the range is unusually quiet. There is not much interaction amongst the players and everything seems more business like. A perfect parallel may be the driving range when the last few groups are preparing to play on Sunday of most events on the PGA Tour. 
There may be a grin and a muted hello, but each golfer is all business.