Greg Olsen had nothing but effusive praise for his friend Travis Kelce's relationship with girlfriend Taylor Swift after spending a memorable weekend with the couple. Olsen, 40, and Kelce, 35, cocreated Tight End University with San Francisco 49ers star George Kittle. At this year's gathering in June, Swift, also 35, appeared with Kelce at the opening night party and even surprised the crowd in Nashville with a live performance.