As has become customary, the Wyndham Championship will close the PGA Tour regular season and define the field for the FedEx St. Jude Championship, the first tournament of the playoffs.Like last year, the top 70 in the FedEx Cup rankings will make the trip to Memphis.Naturally, the tension can be cut with a knife among the players ranked around 70th. Not surprisingly, most of them are present at the Wyndham Championship.Below are seven players who can win or lose it all at Sedgefield Country Club in Greensboro, North CarolinaSeven Players With Playoff Spots On the Line at Wyndham ChampionshipTony FinauAs of right now, Tony Finau is qualified for the next stage because he's currently ranked 60th, but his presence at the Wyndham Championship is not for nothing. Fewer than 100 points separate him from 70th, so he can't let his guard down in the final tournament of the year.Finau, who finished in the top 30 of the FedEx Cup last season and played in the Tour Championship, has only earned one top-10 finish this year and hasn't finished in the top 20 since May.Rickie FowlerRickie Fowler is currently ranked 61st, so he'll be in Greensboro working to maintain his status. Fowler has only one top-10 finish this season, though he's improved his results in the last month, with three consecutive top-30 finishes, including T14 at The Open Championship.Gary WoodlandGary Woodland (75th) is only 33 points outside the top 70, so he needs a solid but not brilliant result at the Wyndham Championship. The major winner is coming off one of those at the 3M Open, where he finished tied for 20th.However, this was only his fourth top-20 finish of the year and his first since last May.Adam ScottAdam Scott (85th) is another past major champion who's struggling. He's forced to get as close as possible to the title in Greensboro to secure a last-minute ticket to Memphis.Scott was another player who finished in the top 30 of the FedEx Cup a year ago and played in the TOUR Championship, but this season he has been far from those results. Suffice it to say, he has no top-10 finishes in 16 tournaments played.Tom KimTom Kim (89th) had a below expectations last season, but the current has been worse. The Korean has only one top-10 finish in 22 tournaments. Three of his eight missed cuts this season have come in his last five starts.Joel DahmenA year ago, Joel Dahmen (101st) struggled almost until the last putt to keep his PGA Tour card. This season has been a near carbon copy.Dahmen has achieved several notable finishes, a second-place finish and two other top-10s. But he's also missed 12 cuts in 21 tournaments, putting him not only out of the playoffs but also in danger of losing his card.If he doesn't win the Wyndham Championship, he'll have another stressful FedEx Cup Fall ahead of him.Max HomaSix-time PGA Tour winner Max Homa (106th) also needs to win in Greensboro to make the playoffs.Homa just finished in his first top-10 of the season three weeks ago at the John Deere Classic, but his next two starts were outside the top 35.More Golf: Nelly Korda Displays 'Nothing Else to Prove' Mentality At AIG Women's Open