They say age is just a number. In WWE, this saying holds much relevance as a host of superstars have upped their game as they have grown older.Legends like The Undertaker, Shawn Michaels, Triple H and Kane have showcased some memorable matches in their late 40s to early 50s. This is undoubtedly a testament to their fitness, unparalleled in-ring ability and the passion they have for the business.In a similar vein, there are a number of superstars on the current WWE roster who, despite not having age on their side, are putting in performances worth every praise. Here's a look at the six oldest superstars currently in WWE:#6 WWE Superstar - Shelton Benjamin (46 years old)Shelton J. Benjamin@Sheltyb803Do the "V" for #VictoryOverCancer and support Tomorrow's Superstars today. @ConnorsCure @WWECommunity @TheVFoundation7:36 AM · Sep 24, 202135127Do the "V" for #VictoryOverCancer and support Tomorrow's Superstars today. @ConnorsCure @WWECommunity @TheVFoundation https://t.co/8EBiRb9liRShelton Benjamin has been one of the most gifted talents in the mid-card division in WWE.A former three-time Intercontinental Champion, three-time 24/7 Champion, two-time Tag Team Champion as well as a United States titleholder, Benjamin has carved out quite a success story in the company.At 46 years old, he is still going strong as part of Monday Night RAW, performing as a member of The Hurt Business and competes in tag team action with his partner Cedric Alexander.#5 WWE Superstar - Rey Mysterio (46 years old)♛Rey Mysterio❔@reymysterioYou already know, just missing the flash light!! 👻 🔦 🎃 twitter.com/WWE/status/145…WWE@WWEgoing trick or treating last night like... 🎃👻🍫@reymysterio@DomMysterio35 #WWERaw11:17 AM · Nov 2, 202154055going trick or treating last night like... 🎃👻🍫@reymysterio@DomMysterio35 #WWERaw https://t.co/qoIsSUqnnfYou already know, just missing the flash light!! 👻 🔦 🎃 twitter.com/WWE/status/145…WWE superstar Rey Mysterio, at 46 years old, is still entertaining fans with his high-flying in-ring ability, like he did when he made his debut in 2002.The 'Master of 619' despite his small size, has stood toe-to-toe with some of the biggest giants in the business, the likes of The Underaker, Kane and The Big Show. He has achieved various feats by being a former World Champion, Tag Team Champion, Cruiserweight Champion and a Royal Rumble winner.Mysterio currently competes on Monday Night RAW predominantly as a tag team competitor with his Dominik.