No matter how successful a wrestler has been, a senior wrestler at the NCAA Championships is facing his "last chance" as a college athlete.    For some wrestlers, it's a last chance to be an All-American. For others, it's a last chance to win a national title. For others, it's a last chance to win another NCAA crown. Regardless of the previous level of success, all seniors are facing the end of the road for their college wrestling journey.    Three seniors entered the quarterfinal round with their last chance to become a two-time champion: Iowa State's Aaron Holker, plus Minnesota's Jared Lawrence and Luke Becker. Seniors who placed second last year and were looking for their first NCAA crown include Minnesota's Ryan Lewis and Illinois Matt Lackey.    This year, there are 115 college seniors out of the field of 330 athletes. Every one of them has a personal "last chance" story.    One of those senior stories belongs to Shane Cunanan of West Virginia, a fifth-year senior from Spokane, Wash. His story includes two universities, Oregon State, who he wrestled for twice at the NCAA meet, and West Virginia.     On paper, you would not expect much from Cunanan. He is unseeded. His career record at the NCAA Championships is 5-6. His 27-8 record this year, with a third-place at the EWL Tournament, does not provide any information about what is in his heart.    Shane Cunanan has no more chances. And he is taking advantage of his last one. With three wins so far this year, Cunanan has already clinched his first All-American honor. And his goal this year is the same as other times - he wants to be a NCAA champion. The difference is that this year he might be able to reach that dream.    Cunanan made big news on Thursday, when he defeated No. 2 seed Zack Esposito of Oklahoma State in the second round. On Friday morning, his next challenge was No. 7 Dana Holland of Arizona State. In another exciting finish, Cunanan scored a 5-3 overtime win. He is now in the semifinals, to face No. 3 Dylan Long of Northern Iowa.    After the big win over Esposito, Cunanan talked about his belief in himself, in spite of never having had much success in this tournament.    "It's big," said Cunanan. "It's just another match. It helps me reach my goal. My goal is to be a national champion."    If Cunanan has an edge over his opponents because this is his last chance, he won't admit it to himself.    "I didn't want to put pressure on myself that it's my last try," he said. "Last year, I pushed myself to win. I didn't want to work myself up this year. This year, the focus is to do my best. I feel that if I do my best wrestling, I can win any match."    According to Mountaineer coach Craig Turnbull, he never doubted Cunanan's commitment to excellence. "I never had to worry about his effort or his motivation," said Turnbull. "I only had to wonder if he will win." This year, Cunanan has been getting the victories that were elusive in other years, in spite of his best effort.    Another senior under the gun is Ohio State's Keaton Anderson, the No. 2 seed at 157 pounds. Based upon his performance all year, Anderson seemed like a good bet to do very well at his final NCAA meet. His record coming in to the NCAA meet is an impressive 33-1 overall.    However, at the Big Ten meet two weeks ago, Anderson tore up his knee and had to drop out, placing sixth. Nobody knew if he could function this week at all, let alone challenge for a gold medal. Whether he should have received the No. 2 seed was the topic of the pre-tournament press conference with many of the nation's top coaches.    Wearing a heavy brace on his leg, Anderson has basically ignored his injury. He is a senior, after all, and this is his last chance. And like Cunanan, he was not an All-American before.    "The knee feels good," said Anderson, after his second round win on Thursday night. "It hasn't been hurting. It's a plus. I am ignoring it and doing what I always do. This is my last chance this year. I have to do what I can do."    What he has been doing is winning. After a 7-3 win over No. 7 Derek Zinck of Lehigh in the quarterfinals, he has earned his All-American award. Now a gold medal remains out there in his grasp. His semifinal opponent will be Big Ten opponent Ryan Bertin of Michigan.    "I have never been an All-American before. That clinched it. Now I have to keep going hard," said Anderson. If the knee was slowing him down, Anderson sure had everybody else fooled.     The quarterfinals can be cruel on any wrestler, but especially seniors. Two of last year's champions, who took gold medals as juniors, will not even be in tonight's semifinals. Both Holker and Becker were defeated, and will not go out with another title. Only Jared Lawrence remains in the hunt. Runners-up Ryan Lewis and Matt Lackey qualified for the semifinals, and will have another chance to work towards their own personal goals.    Like Cunanan and Anderson, all of the seniors left in the field have a chance to determine their final college wrestling memory. Going out with a victory is something that all of them would like to do this time around.