The NBA is not an easy place for aging players to hang around. The game is physically demanding and playing contact sports takes its toll on the body.Most NBA players see a sharp decline in their performance and capabilities as they enter their twilight years. At that stage, players are either forced to retire or accept new reduced roles with limited minutes on the floor.5 NBA Players who could retire after this seasonOn the flip side, there have been many players who have retired too early and could have squeezed out a few more years playing the sport they love. Basketball is not just a game but a lifestyle, it can become hard to say goodbye to it all, but as they say, 'time doesn't wait for anyone.'In this list, we will look at five players who may call it quits after the 2020-2021 NBA season.#1 Pau GasolSan Antonio Spurs v Los Angeles LakersPau Gasol is a future Hall of Famer and one of the most accomplished NBA bigs to have played the game. He was the second option after the late great Kobe Bryant in the LA Lakers back-to-back title runs of 2009 and 2010. Pau has also been a leader for Spain's national basketball team and has a stacked international basketball resume.#GrizzliesOTD in 2019: @memgrizz defeated @spurs 96-86 in what marks (to date) @paugasol's final game played in Memphis.The Grizzlies' first @NBAAllStar (2006), Gasol played his first 6+ @NBA seasons in Memphis (2001-08) and averaged 18.8 PPG, 8.6 RPG and 3.1 APG in 476 games. pic.twitter.com/kee8WfLn0f— Grizzlies PR (@GrizzliesPR) January 9, 2021Gasol was recently been in the news as there were rumors of him rejoining the LA Lakers and teaming up with his brother, Marc Gasol. We will have to wait and watch if the Lakers do move for him, but the former All-Star certainly won't be suiting up for minutes on the floor as his playing days are behind him.Pau Gasol is one of the prime candidates to retire after this season ends.#2 Tyson ChandlerIndiana Pacers v Houston RocketsDrafted back in 2001, Tyson Chandler has successfully defied time and has lasted extremely long as a front line player. Most bigs in the NBA are cursed with a shorter period of relevance when compared to their backcourt counterparts.Chandler has a lot of miles under his NBA career and boasts of an impressive list of accomplishments. He was the 2012 Defensive Player of the Year, but is best known for the Dallas Mavericks’ NBA Championship run in 2011, in which he played a vital role.Tyson Chandler of the @NYKnicks named 2011-12 KIA NBA Defensive Player of the Year. http://t.co/k1UZ4B6q— NBA (@NBA) May 2, 2012However, times have changed and with it, the need for a traditional center like Chandler has reduced significantly.With little to offer in today's changed basketball landscape, Tyson Chandler could decide to hang it up after this season.