LOUISVILLE, Ky. – Curlin, the unbeaten winner of the Arkansas Derby, worked four furlongs on Monday morning at Churchill Downs in preparation for Saturday's 133rd Kentucky Derby.

Five other 3-year-olds expected to run in the Derby also breezed.

Curlin was timed by Daily Racing Form in 48.46 seconds. His Steve Asmussen-trained stablemate Zanjero was timed by DRF in 48.34 seconds for a half-mile.

Hard Spun, the Lane's End winner, turned in a sizzling five-furlong drill in 57.53 seconds for trainer Larry Jones.

LOUISVILLE, Ky. - Nine prospective starters for Saturday's Kentucky Derby worked at three different venues on Sunday morning, including trainer Todd Pletcher’s top three prospects at Keeneland and Nobiz Like Shobiz at Belmont Park.

At Keeneland, Any Given Saturday worked an easy five furlongs in 1:01.25 seconds, Circular Quay went five-eighths in 1:00.25, and Scat Daddy the same distance in 59.56 over the Polytrack surface. All three horses were ridden by Hall of Fame jockey Angel Cordero Jr.

ELMONT, N.Y. - Nobiz Like Shobiz, the Wood Memorial winner, completed preparations for Saturday's Kentucky Derby by working five furlongs in 59.98 seconds Sunday morning over a fast Belmont Park main track.

LOUISVILLE, Ky. - Southwest Stakes winner Teuflesberg worked five furlongs Sunday morning at Churchill Downs for what his connections hope will be a start in Saturday’s Kentucky Derby.

With trainer and co-owner Jamie Sanders in the irons, Teuflesberg started slowly and finished well. Churchill Downs clockers timed him covering five furlongs in 1:00.80 after splits of 24.80 seconds, 36.80, and 48.60. He galloped out six furlongs in 1:14.80.

LEXINGTON, Ky. – Saturday was the calm before the storm, in terms of final Kentucky Derby workouts as only one prospective member of the starting lineup, Cowtown Cat, turned in a recorded work, which came over the Polytrack surface at Keeneland. Things will heat up Sunday and Monday, when more than half the Derby field is scheduled to work at four different venues – Keeneland, Belmont Park, Hollywood Park, and Churchill Downs. The final Derby worker should be the likely favorite, Street Sense, who is currently penciled in to breeze at Churchill Downs on Tuesday morning.

LOUISVILLE, Ky. - Although the lone horse to work on Saturday for next Saturday's Kentucky Derby is still stabled 72 miles away at Keeneland, the focus for Derby 133 began to swing to Churchill Downs, where the track opened with a Derby Trial more notable for its absences.

Both Bwana Bull and Teuflesberg scratched from the $100,000 Derby Trial in order to run in the Derby seven days later. Bwana Bull is assured of a spot in the field, but the connections of Teuflesberg will have some anxious moments over the next few days before entries are taken on Wednesday.

LOUISVILLE, Ky. - Steve Asmussen was standing under the shed row of his barn at Churchill Downs having a casual conversation the other morning when he suddenly grew distracted by something seemingly imperceptible.

LEXINGTON, Ky. - The Kentucky Derby will be run at Churchill Downs for the 133rd time on May 5. But nearly all of the important pre-Derby activities this past week took place at Keeneland where the majority of the prospective starters will put in their final major preps through Sunday.

Trainer Doug O'Neill was in the spotlight on Friday morning, working all three of his Derby starters and his Kentucky Oaks hopeful Mistical Plan over Keeneland's fast Polytrack surface. All four worked six furlongs under cloudy skies with exercise rider Tony Romero aboard.

LEXINGTON, Ky. - Doug O'Neill has never run a horse in the Kentucky Derby, but next Saturday he is scheduled to erase that drought, and in triplicate. Cobalt Blue, Great Hunter, and Liquidity are ticketed to the 133rd Derby for California's winningest trainer, and Friday at Keeneland, all three put in their final works for the Derby.

For Great Hunter, considered the best of O'Neill's group, it was his first and lone drill since he finished a troubled fifth in the Blue Grass Stakes 13 days earlier. Both Cobalt Blue and Liquidity worked here one week earlier.

There will be a lot of discussion in the next week about Curlin trying to become the first horse to win the Derby who did not race as a 2-year-old since Apollo in 1882 and the first horse to win the race with only three lifetime starts since Regret in 1915.

The last horse to try to do what Curlin is trying was Showing Up, who finished sixth in last year's Derby after winning his first three starts, including the Lexington Stakes. Barclay Tagg, the trainer of Showing Up, said talent can overcome inexperience.