Though Marlon and Efren made big scores towards the end of 2005, it is important to remember that the Texas Hold'em Billiards Championship had a limited cast of players, and the IPT KOTH Shootout, though it did have 44 players in total on the roster, was an invitational event as well.
Marlon did win back-to-back "open" events when he first hit the States earlier in the year.
Efren Reyes started off 2005 with a bang, snapping off the DCC all-around player title.
Shawn Putnam has also enjoyed a good showing, himself winning back-to-back events, the now-defunct Hilton-sponsored tournament in Pittsburgh and the pro event at the Super Billiards Expo in Valley Forge.
I do not think the player who wins the most money is a statistically significant factor since some events may be invitationals and/or have much larger payouts than others. However, the above-referenced three players have all shined brightly in the year 2005, IMHO.
JAM