Buser said he couldn't worry about the performance of others because he had no control over that.
Those at the front of the field included four-time champions Lance Mackey and Martin Buser, who later fell behind.
Buser dropped two dogs there and left with 11 dogs at 2:41 a.m.
Jack Buser, senior director of PlayStation digital platforms for Sony Computer Entertainment America, says the company will expand that technology to all kinds of other Sony products.
According to sled positioning trackers, Zirkle, Seavey and other teams out of Eagle Island were traveling at faster speeds than Buser's team and many had more dogs.
Zirkle and Seavey were especially close to Buser on the Kaltag approach early Saturday afternoon, with Zirkle running 9 miles behind him and Seavey a mile behind Zirkle.
Buser tried a strategy early in the race that had many competitors shaking their heads, but he was hoping it would pay off by letting him get to Nome first.
On the seventh day of the race, Buser was first out of the checkpoint at Eagle Island, where a single cabin is the only dwelling in the otherwise uninhabited stretch of trail.
On the second day of the competitive portion of the race, Buser took his mandatory 24-hour rest at the checkpoint in Rohn after a blistering fast 170-mile run that had put him hours ahead of the other teams.
ANCHORAGE, Alaska (AP) Four-time champion Martin Buser held on to the lead Saturday in Alaska's Iditarod Trail Sled Dog Race, hoping to be only the second musher to ever claim a fifth title in the race's 40-year-history.
Our upcoming 'PSN Day 1 Digital' lineup in October is exceptional and demonstrates our commitment to delivering the best games to the devoted PlayStation community as soon as they're available, " said Jack Buser, Senior Director, PlayStation Digital Platforms, SCEA. "Additionally, with our new PlayStation 3 models on the horizon offering up to 500GB of storage, there's never been a better time to experience PS3 games digitally through PSN.
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