Webb Simpson, chasing England's Luke Donald for the US PGA Tour's money title, nabbed a brace of late birdies for a share of second place after two rounds of the McGladrey Classic. Unheralded Billy Horschel surged into the lead with an eagle and two birdies in his last four holes, firing a six-under 64 on the par-70 Seaside course for a 36-hole total of 12-under 128. But overnight co-leader Simpson, winner of two tournaments on the US tour this year, stayed in touch with a three-under 67 for 130, tied for second with Michael Thompson (65). Simpson said after the second round that he would play the PGA Tour's final official tournament next week in Florida, where he could find himself in a battle with Donald for the season money crown. World number one Donald, currently leading Simpson atop the money list by $68,971, said earlier Friday that he would add the Disney tournament to his schedule. "There was never really a decision to be made. I have a chance of making history. See you all at Disney next week," Donald said on Twitter. The Englishman, who leads the European tour's Race to Dubai money standings, could become the first player to sweep the money titles of both tours. Simpson clearly wants to foil that bid for history. He rebounded from a bogey at the par-four fourth hole with back-to-back birdies at seven and eight, then bagged two more birdies at 15 and 16 to join Thompson atop the leaderboard. They stayed in front until Horschel's late surge, fueled by an eagle at the par-five 16th. "I figured Luke was going to play," Simpson said. "I think he's kind of thinking the same thing I'm thinking, that if one of us was going to play, the other one really needed to. "It's going to be fun. He's one of the most competitive guys on tour, and so I'm sure he's going to come guns loaded, and he's going to play great like he has all year." Simpson would like nothing better than to go into next week's event fresh off his third victory of the season. So far no one has won more than twice on the US tour this season, so that would boost his chances for Player of the Year honors as well as his bid for the money title. "A lot is going to happen next week," Simpson said. "And a lot can happen this weekend. I'm just going to try and win the golf tournament. If I can play well this weekend -- even if I don't win -- a great chunk will be added to the money list." In terms of the money list, Horschel is just trying to boost himself from his current 139th into the top 125 to keep his card. However, he said that couldn't be his focus. "I'm not worried about No. 139," Horschel said. "I'm worried about playing well."