MARS HILL, N.C. - For the past few years, Jeff Robinson has had the deepest bull pen of any stock contractor in the PBR.

Last week, while capping off his second consecutive season as PBR Stock Contractor of Year, he partnered with Dennis Tebow and Zach Penn of Wolf Creek Cattle Co. to purchase the Top 2 ABBI Classic bulls.

In 2012, he'll haul both Back Bender and Bad Blake.

"We had to," said Robinson, who began putting the deals together during the Built Ford Tough Series event in Wichita, Kan. "A lot of my good bulls are getting old."

His bulls like Voodoo Child, Major Payne, I'm a Gangster, and longtime fan-favorite Chicken on a Chain are at "an age where they're done."

Voodoo and Major Payne have been retired, Gangster was injured last year, and Chicken is likely coming up on his last season.

'I think they're the best 4-year-olds you could have bought.'

Back Bender and Bad Blake will join Rango, another strong Classic contender, in North Carolina.

Robinson said he was interested in Back Bender for one reason: "He's a consistent short-round bull."

In 2011, Back Bender made 12 appearances on the BFTS, and was ridden only once, when Guilherme Marchi made the whistle in San Antonio for 90.5 points.

His average bull score improved to 44.27 points this year, which is up from 43.63 points in his two outings a year earlier. He did so well in Las Vegas that in addition to the two Classic rounds, in which he earned $250,000 in prize money for Kent Cox and Doug Ackerman, he also appeared in the Built Ford Tough Championship Round.

Back Bender and Bad Blake are already housed at Robinson's ranch in Mars Hill, N.C.

Bad Blake prepares to dust Cody Campbell in Round 4 of the World Finals.

"I think they're the best 4-year-olds you could have bought," Robinson said.

The 41-year-old contractor, who in 2011 recorded 601 total outs, with 91 in championship rounds, said he hopes to have eight to 10 new bulls on his trailer. Chad Berger was only other contractor to reach 50 final-round outs in 2011, and even he had 40 fewer than Robinson.

It's only the third time a contractor has had a deep enough pen to record 600 or more outs. Robinson has accomplished the feat for two consecutive years.

He was the only contractor last season to have at least one bull competing at all 29 BFTS events. He had more than 20 of them at the PBR World Finals.

"You have to keep adding and adding and adding," he said.