U.S. Ryder Cup Captain Tom Lehman got a big boost on Sunday when two members of the team he’ll take to Ireland in September captured tournament titles.

Of course, Corey Pavin, who won the U.S. Bank Championship in Milwaukee, and Senior British Open winner Loren Roberts, are his assistant captains.

The 46-year-old Pavin, who won for the first time in a decade, did make the biggest jump in the U.S. standings, though -- moving from 111th to No. 27, just one notch ahead of Lehman himself.

Such a dramatic jump shows just how volatile the standings are, and with three tournaments remaining before the 10 automatic qualifiers are finalized, there still could be a lot of movement.

Two weeks ago, for example, John Rollins moved from 39th to 10th with his win at the B.C. Open and Chris DiMarco climbed 15 spots to No. 6 with that runner-up finish at the British Open.

The stakes are equally high this week at the Buick Open. Anyone who ranks in the top 40 in the Ryder Cup standings could move into the top 10 with a win at Warwick Hills -- and the 375 points that go along with it.

Next week’s INTERNATIONAL also offers first-place points of 375. The real bonus, though, comes at the PGA Championship, the season’s final major, that will award a whopping 675 points to the winner -- only 10 less than Rollins has right now sitting in 10th place.

The top-10 players in the standings when the PGA is over automatically qualify for the team. Lehman will then make two captain’s picks so how the players jockeying for position over these last three weeks perform will definitely have an impact.

Jerry Kelly, who finished two strokes behind the gritty Pavin on Sunday, planted himself firmly on Lehman’s radar screen when he jumped 10 spots to 12th in the standings. He’d be a Ryder Cup rookie but went 2-2 in the 2003 Presidents Cup.

Eight of the players currently in the top 10 of the U.S. Ryder Cup standings are playing in the Buick Open. Only 11 of the ones who rank from No. 11 through 30th, though, are entered at Warwick Hills.

On the opposite side of the pond, many of the European Ryder Cup hopefuls are taking the week off. As a result, Carl Pettersson and Robert Karlsson, who rank Nos. 8 and 9, respectively, on the Ryder Cup World Points List, might be able to capitalize with a strong finish at the EnterCard Scandinavian Masters.

The players to watch in Michigan this week are No. 13 Lucas Glover, Tom Pernice Jr. (17th), Arron Oberholser (18th), Billy Mayfair (20th), Brett Quigley (21st) Scott Verplank (22nd), Jeff Sluman (23rd), Ben Curtis (24th) and Heath Slocum (30th).

Oh, and don’t forget about Pavin, who has played on three Ryder Cup teams. He’s got an 8-5 record overall, including a 2-1 mark in singles. Another strong finish and Lehman might have to reconsider Pavin’s role.