Who's on the FedEx Cup bubble -- and how can each make the top 70? - ESPN

The Wyndham Championship, the final tournament of the PGA Tour regular season, tees off Thursday in Greensboro, North Carolina.

Once again, there figures to be drama as rookie sensation Jackson Koivun will attempt to stay in the top 70 of the FedEx Cup standings, which would earn him a spot in next week's FedEx St. Jude Championship in Memphis, Tennessee.

The top 70 golfers in the standings after the Wyndham Championship will advance to the first leg of the FedEx Cup playoffs. After that, the top 50 golfers in the standings will play in the BMW Championship at Bellerive Country Club in St. Louis on Aug. 20-23.

The top 30 golfers in the standings after the BMW Championship will qualify for the Tour Championship at East Lake Golf Club in Atlanta on Aug. 27-30.

Last season, Chris Kirk moved into the top 70 after the Wyndham Championship, while Byeong Hun An fell out.

Aldrich Potgieter, Ricky Castillo, Matti Schmid, Jordan Smith, Steven Fisk and Koivun are currently ranked Nos. 65-70 in the season rankings.

Mac Meissner is 71st in the FedEx Cup standings. He'll have to finish solo 44th or better in the Wyndham Championship to move up a spot, according to projections provided to ESPN by the PGA Tour.

Meissner was the runner-up in last season's Wyndham Championship, the best finish of his career.

Here's a look at some of the notable golfers who have work to do to this week to qualify for the FedEx Cup playoffs:

Potgieter, from South Africa, leads the PGA Tour in driving distance with a 330.4-yard average. However, the rest of his game has been a mess this season — he ranks 121st in strokes gained: approach (-.184), 150th around the green (-.381) and 104th in putting (-.107).

Potgieter still seems to be in decent shape to make