Two-year-old trotting colts and geldings took center stage at Harrah's Hoosier Park with four $35,500 divisions of their opening leg of Indiana Sire Stakes on Thursday (July 10), with Swan Affect and driver LeWayne Miller headlining with a 1:55 3/5 mile in the quickest split at odds of 9-1.    Leaving from the outside post eight, Miller floated away in sixth but was caught wide on the first turn as a host of leavers scrambled for the lead, with Swan Jayden (Marcus Miller) reaching the quarter first inside of August Salazar (Geremy Bobbitt) in 28 4/5. August Salazar worked to the lead before being covered up by Sunday Swagger (Kyle Wilfong) on the backstretch, leaving Swan Affect now first-up and working to the lead at the half in 57 3/5. Swan Affect finally saw the cones for the first time entering the final turn, clearing to the lead before reaching three-quarters in 1:27. Turning for home, Sunday Swagger popped the pocket and applied pressure to Swan Affect, who quickly responded under Miller urging. Trotting home in 28 3/5, Swan Affect raced gamely on the lead to hold Sunday Swagger at bay by a half-length in 1:55 3/5. Muscle Technician (Trace Tetrick) rallied up the cones to be third, three lengths behind the winner. Trained by Walter Haynes Jr., the victory was the first for Swan Affect in his second outing after finishing in the runner-up spot in his career debut. Bred by Lavon Miller and John McGill, McGill also co-owns the gelded son of Swan For All-Flower Hour along with Twoforone Stable. In the first split, Mcmikenmike and driver Marcus Miller pulled a 9-1 upset to score in 1:56 2/5. Skyway Awestruck (Mike Peterson) took command after the quarter of 27 3/5 before controlling middle-half fractions of 57 4/5 and 1:28 2/5. Pulling from fourth on the cones turning for home, Mcmikenmike overcame a 6 1/2 length deficit and a broken headpole with a 26 4/5 last quarter to nail Skyway Awestruck by a nose on the line. Hawt Yoga (Ricky Macomber Jr.) rallied up the rail to be third, three-parts of a length back. It was the maiden-breaking victory for the Erv Miller-trained Mcmikenmike, who is owned by Anthony Lombardi, Doug Overhiser and George Golemes. The gelded son of Don't Let'em-Myrna Myrna was bred by Luckiana Farm. ► Sign up for our FREE DRF Harness Digest Newsletter Great Commission and Aaron Stutzman laid claim to the third division, romping in his career debut in 1:57 3/5. Great Commission got away fifth in the early stages while Bravo Alpha (Doug Rideout) worked to the top at the quarter in 28 seconds. Meadowbrook Ryan (Clint Coy) brushed to the lead just past the half in 58 seconds, leaving Great Commission to his outside and driving to engage the new leader at three-quarters in 1:28 1/5. Great Commission put away Meadowbrook Ryan at the top of the stretch, coasting home from there with a motionless Stutzman in the bike to cruise by 3 1/4 lengths. Spring Street (Ricky Macomber Jr.) finished second, with Bravo Alpha holding for third. A Helpisontheway-Majic Trend colt, Great Commission is owned by James Miller and was bred by Black Creek Farm and Hickory Hollow Stables. The fourth and final division saw Premier Bluebird rebound from a defeat in his last outing with a dominant score with driver John De Long. Premier Bluebird floated away in fourth early while 6-5 second choice I'too Volo (Trace Tetrick) cut the opening quarter in 28 2/5. I'too Volo had things his way to the half in 58 1/5 before carrying a two length advantage to three-quarters in 1:28 3/5 when De Long right-lined Premier Bluebird from fourth. Gobbling up ground with a 27 2/5 last quarter, Premier Bluebird quickly chased down I'too Volo before powering clear by three lengths on the wire in a career-best 1:56 4/5. I'too Volo held sway for second, while Winnin Dallars (Ricky Macomber Jr.) finished third at 64-1. Zach Miller trains and co-owns Premier Bluebird along with Dessa Miller. The $4,500 bargain buy at last fall's Hoosier Classic is now a three-time winner and yet to be worse than second in five outings. Daryl Miller and Dennis Bontrager bred the son of Pilot Discretion-Winery Hanover. Racing continues at Harrah's Hoosier Park on Friday, July 11 with a 14-race program set to begin at 6:15 p.m. (EDT). The Friday card features a pair of Indiana Sire Stakes divisions for the two-year-old pacing colts and geldings, in addition to a $7,500 guaranteed early Pick 5 (races 1-5) and late Hoosier High 5 (race 14), with the latter done in partnership with the USTA's Strategic Wagering Program.  --press release (Harrah's Hoosier Park)--