Tom Brady’s Super Bowl victory continues a string of big wins for aging professional athletes — and at 39 years old, Brady has said he has no plans to retire. The second-oldest quarterback to win the Super Bowl after Peyton Manning, Brady signals what avid fans and sports experts are calling a growing trend of older athletes — from mid-30s tennis icons Roger Federer, Serena Williams and sister Venus to Florida Panthers right wing Jaromír Jágr, who turns 45 next week. "We’ve really started to notice it in the last five or six years," said Shawn Arent, director of the Center for Health and Human Performance at Rutgers University. "Don’t be at all surprised if … (we see) some of these guys winning their sixth Super Bowl in their 40s," he added.