The PCA Main Event has reached Day 4 with just 48 remaining players. American Chris Oliver is topping the chip counts with 3.6 million chips, while Chris Moneymaker is number five.Yesterday saw another 120 players hit the rail at the PCA Main Event, bringing Day 4's starting field down to 48 live players.Of these, American Chris Oliver is currently doing best, topping the leader board with 3,675,000 chips. Oliver started the day with 1.3 million, but managed to uphold his momentum until he had made it to the top of the counts.According to the PokerStars Blog, Oliver "gave a performance that at times baffled and bewildered, then bemused, a truly barnstorming display that will leave a mark on those he encountered as they look back on what hit them."Oliver cracked Ace-King three times in three decisive all-in preflop pots, using hands such as ten-seven, ten-three and seven-five.The strategy seemed to work, and to the frustration of his opponents, he will as such lead the pack as the remaining 48 players return for their seats at the Atlantis Resort later today.Also making a dashing performance was Chris Moneymaker, who has only made a single six-figure cash since he won the 2003 WSOP Main Event for $2.5 million.In the Bahamas, things nonetheless seem to be improving by the hour for the former accountant, and he is now fifth with 1.63 million chips.Between him and Oliver are Max Lehmanski with 2.34 million, John Andress with 1.95 million and Galen Hall with 1.67 million.EPT Vilamoura winner Toby Lewis is in the top 20 with 979,000, while two-times WSOP bracelet holder Eric Froehlich is also alive in 15th place with 1.1 million.Yesterday's chip leader Adam Geyer has plummeted to the bottom of the field with just 435,000, while winner of the tournament's first day, Walid Bou-Habib, is left with 982,000.Play will resume at noon today, local time.