Unlike Saturday when he beat Mesa by a relatively comfortable 1.118 seconds, Alexander crossed the finish line just .012 seconds ahead of his rival this time in a breathtaking three-way photo finish. Tomas Puerta ended up third, just one-thousandth of a second behind Mesa.RoaCarey Alexander (National Guard Celtric Racing Suzuki GSX-R600) says: “We changed positions so many times, it was tough to remember everything that happened. I could have been first, and I could have been fifth. I was glad to win it. Everyone in the top five had an awesome race.“The bike was great all weekend, and we have some momentum going into Barber.”Alexander’s performance at this weekend’s Subway SuperBike Doubleheader offered a measure of redemption from the season opener in Daytona, where the he followed up a disappointing 14th-place finish on Day 1 with an improved third-place result in Day 2. He is now second in the Motorcycle Superstore SuperSport points, six back of Mesa.Motosport.com Yamaha pro Mesa, meanwhile, has now finished on the podium in three of four SuperSport races, including a victory in the first Daytona race.Stefano Mesa says: “It was a solid weekend with the new team. Two second-place finishes is good. It was a good fight again today. All five of us out there were riding strong. My hat is off to the others.”Coming off a victory in the second Daytona race, Puerta rode his RoadRace Factory Yamaha to fourth and third place finishes this weekend.Travis Wyman from Harv’s Harley-Davidson and Jeffrey Tigert of the Baby Appleseed team were fourth and fifth Sunday, respectively. Wyman is now third in the championship points.The top five riders finished the race within 0.425 seconds of one another in a race that was red-flagged and postponed until later in the day after a scary pile-up during a restart at the regularly scheduled time.The 2013 GEICO Motorcycle AMA Pro Road Racing season continues in two weeks on June 21-23 at Barber Motorsports Park in Birmingham, Ala.