1 (tie). Georges St. Pierre
Points: 163 (five first-place votes)
Affiliation: UFC
Weight class: Welterweight (UFC welterweight champion)
Hometown: Saint-Isidore, Quebec
Record: 18-2 (won past five)
Last month's ranking: 3
Most recent result: def. B.J. Penn, doctor stoppage after R4, Jan. 31
Analysis: About the only piece of intrigue left for St. Pierre at welterweight is how he will be able to neutralize Thiago Alves' strength and standup game.

 3. Anderson Silva
Points: 154 (four first-place votes)
Affiliation: UFC
Weight class: Middleweight (UFC middleweight champion)
Hometown: Curitiba, Brazil
Record: 23-4 (won past nine)
Last month's ranking: 1 (tie)
Most recent result: def. Thales Leites, unanimous decision, April 18
Analysis: Has about the greatest opportunity for redemption he could have possibly asked for in getting Forrest Griffin as an opponent on Aug. 8.

 4. Miguel Angel Torres
Points:126 (1 first-place vote)
Affiliation: WEC
Weight class: Bantamweight (WEC bantamweight champion)
Hometown: East Chicago, Ind.
Record: 36-1 (won past 17)
Last month's ranking: 4
Most recent result: def. Takeya Mizugaki, unanimous decision, April 5
Analysis: Unbeaten Brian Bowles feels he has something to prove against Torres in August after having to drop out of their scheduled April fight.

 6. B.J. Penn
Points: 84
Affiliation: UFC
Weight class: Lightweight (UFC lightweight champion)
Hometown: Hilo, Hawaii
Record: 13-5-1 (lost past one)
Last month's ranking: 6
Most recent result: lost to Georges St. Pierre, doctor stoppage after R4, Jan. 31
Analysis: Should be starting serious training soon for his August title defense against Kenny Florian. Or, we hope he is, at least.

 7. Lyoto Machida
Points: 58
Affiliation: UFC
Weight class: Light heavyweight
Hometown: Belem, Brazil
Record: 14-0
Last month's ranking: 7
Most recent result: def. Thiago Silva, R1 TKO, Jan. 31
Analysis: Machida's hit-and-run style might be a headache for the UFC's marketing department, but if he's UFC light heavyweight champ this time next month, that will be the least of his concerns.

 8. Quinton Jackson
Points: 55
Affiliation: UFC
Weight class: Light heavyweight
Hometown: Memphis, Tenn.
Record: 30-7 (won last two)
Last month's ranking: 8
Most recent result: def. Keith Jardine, unanimous decision, March 7
Analysis: Still recovering from surgery.

 9. Mike Brown
Points: 28
Affiliation: WEC
Weight class: Featherweight (WEC featherweight champion)
Hometown: Portland, Maine
Record: 21-4 (won last nine)
Last month's ranking: 10
Most recent result: def. Leonard Garcia, R1 TKO, March 1
Analysis: Brown told reporters at a recent gathering that he regularly spars at the American Top Team with welterweight banger Thiago Alves. After enough of that, you're not going to be afraid to face any featherweights.

10. Urijah Faber
Points: 26
Affiliation: WEC
Weight class: Featherweight
Hometown: Sacramento, Calif.
Record: 22-2 (won last one)
Last month's ranking: 10
Most recent result: def. Jens Pulver, R1 TKO, Jan. 25
Analysis: All early indications are that a WEC record crowd will pack the Arco Arena in Sacramento on June 7, giving Faber a considerable hometown advantage in his rematch.