LAS VEGAS (AP) ó Kaycee Feild won the eighth round of the National Finals Rodeo on Thursday night with an 87-point ride on Kateís Hot Sister to increase his lead in the bareback season standings.

Field, the defending champion from Payson, Utah, has earned $222,475 this season, and also leads the event aggregate standings with two rounds left. Will Lowe of Canyon, Texas, who placed second with an 85 on Three Bís, remained second with $182,283.

In the NFR aggregate standings, Feild has 672 points for eight rides. He has cashed checks by finishing among the top six in every round except the seventh, and leads all bareback riders with $80,636 in the NFR.

ďI just need to keep it up and get on each horse with a mindset of no mistakes and concentrate on perfect rides,Ē Feild said. ďI was really disappointed with myself last night. I fell off and hit my head, which happens quite a bit.

ďTonight I tried to forget about last night. Iím happy with the way everything is turning out. Bareback is one of the most physical events at the NFR. Your neck gets real sore, so you canít tuck your chin to see if the horse is going right or left. Staying strong is my main goal. I had a little bobble last night, and it put a spark under me.Ē

In steer wrestling, three-time and defending world champion Luke Branquinho of Los Alamos, Calif., remained atop the standings with $147,184 after failing to placing among the top six with a 4.8-second run.

Wade Sumpter of Fowler, Colo., tied for first at 3.4 with K.C. Jones of Decatur, Texas, and moved from fourth to second with $129,059. Sumpter became the first steer wrestler to win two rounds this year.

In barrel racing, two-time and defending world champion Lindsay Sears of Nanton, Alberta, won the round in 13.69.

NFR rookie Mary Walker of Ennis, Texas, who didnít place in the top six with a 14.10, stayed in front in the standings with $222,406. Second-place Brittany Pozzi of Victoria, Texas, who finished sixth in 13.92, has earned $194,224. Walker also leads all 2012 NFR competitors by earning $95,114.

Kaley Bass of Kissimmee, Fla., who didnít finish among the top six, leads the NFR aggregate standings with a time of 111.75 for eight rides.

In team roping, header Trevor Brazile of Decatur, Texas, and heeler Patrick Smith of Lipan, Texas, remained atop the standings with $182,903 for Brazile and $184,403 for Smith after failing to record a time for the second consecutive round.

Header Kaleb Driggers of Albany, Ga., who has earned $149,834, and heeler Jade Corkill of Fallon, Nev., who has made $145,743, are second after failing to place among the top six. Header Turtle Powell of Stephenville, Texas, and heeler Dugan Kelly of Paso Robles, Calif., won the round in 3.9.

In saddle bronc riding, Jesse Wright of Milford, Utah, was bucked off, leaving his standings-leading total at $206,274. Wright also tops the NFR saddle bronc riding earnings race with $73,176.

Wade Sundell of Boxholm, Iowa, also didnít place among the top six in round eight, but remained second in the standings with $163,458.

Cody DeMoss of Heflin, La., who finished in a three-way tie for third with an 81.5 on Let Er Rip, leads in the NFR aggregate standings race with 629.5 points for eight rides. Heís the lone competitor with eight successful rides. DeMoss also moved up to third in the standings with $146,582.

Tyrell Smith of Cascade, Mont., won the round with an 84 on Cool Runnings.

In tie-down roping, Tuf Cooper of Decatur, Texas, held the lead by finishing fourth in 8.2.

Cooper has earned $184,199, second-place Justin Maass of Giddings, Texas, who placed fifth in 8.4, has made $175,509.

Bradley Bynum of Sterling City, Texas, won the round in 7.2.

In bull riding, J.W. Harris of Mullin, Texas, remained the leader despite being bucked off Western Hauler in 2.9 seconds. Harris has earned $192,971. Cody Teel of Kountze, Texas, who was one of 13 riders who were bucked off in round eight, was a close second with $190,494 in 2012.

Beau Schroeder of China, Texas, leads the NFR aggregate standings race with four successful rides for 343.5 points, while Seth Glause of Cheyenne, Wyo., was second with four rides for 336 points.

Defending world champion Shane Proctor of Grand Coulee, Wash., won the round with an 83.5 on Cowboy Coffee. The only other successful rider, Clayton Savage of Casper, Wyo., had an 82.5 on Drop Tine.

In all-around, Brazile, who clinched his record 10th world championship and seventh in a row Monday night, has earned $298,626.