Andy
Congrats on your tourney picks. You've been very sharp.
I've been doing very well on my 3rd and 4th round head to heads.
Much better than my tourney picks, although I feel; like I've had some bad luck on those and will keep at it.
With regard to your inquiry into betting 3rd and 4th rounds,
I look at this week's GIR (rounds 1 and 2), and driving accuracy vs. Strokes gained putting.
I find the guys putting great and scrambling well must come down to earth and when they are matched up against consistent guys, hitting GIRs at high%, that is an edge.
Also when it comes to the weekend I find that the better players can keep it up (look at OWGR and average score per round) whereas the lesser players again come to earth, ie. JJ Henry yesterday.
Finally, when betting sundays, I look at avg score per 4th round this year.
But more than that, after watching tons of golf, I think I have a good feel for the guys who finish and the guys who choke. I file this away in my mind.
Some guys may have ok final round scoring average but if they are in contention, they don't get to the finish line, ie. Kuchar, Delaet McGirt So final round scoring can be misleading, ie. Delaet yesterday played great. Had he been in contention, I doubt that would've happened.
Lastly but not insignificantly, I strongly consider past history at this course in prior years tourneys. If a guy has played well here before, I look for that to continue. If a guy doesn't play well at this course, maybe the course just doesn't fit their eye, ie. Harmon and Stallings last week
Good luck