The strongest field is in California, though it will have no bearing on the Masters because all 18 players at Sherwood are already eligible (and all of them are in the top 30).
Miguel Angel Jimenez (No. 48) is playing in Hong Kong, by far the weakest of the three fields. If he doesn't play well, the Spaniard risks being passed in the ranking by Richard Sterne (No. 51) or Luiten in South Africa. Also playing in South Africa are Gary Woodland (No. 57 but already in the Masters), Kiradech Aphibarnrat (No. 60) and Peter Uihlein (No. 67).
The final tournament of the year is the Nelson Mandela Invitational, though the field is expected to be weak. Among those expected to play are Branden Grace, currently at No. 50.
For the players who don't quite crack the top 50, Augusta National takes the top 50 one week before the Masters. Then again, Geoff Ogilvy missed the top 50 by one shot in Australia at the end of last year and went backward at the start of a new season.