Marion has opted to retire from the NBA, ESPN.com reports. Marion recently completed his 16th season as a professional, notching zero minutes during the loss to the Warriors in the NBA Finals. During his final campaign, he dealt with ankle and hip injuries, among other ailments, limiting him to 57 games (24 starts) and the worst output of his career by far. No matter, his prime included jam-packed game logs en route to four All-Star Games, two selections to the All-NBA Third Team, and an NBA Championship with the Mavericks in 2011.

Marion did not play in the NBA Finals. He did not top six minutes in the Cavaliers' playoff run. The 37 year old averaged career lows 4.8 points and 3.5 rebounds in 19.3 minutes. Marion was brought to Cleveland to provide some championship experience (2010-11 with the Mavericks), but did not look like he had much in the tank by the end of the season. He does not have a contract for 2015-16, so we may have seen the last of the Matrix in the NBA.

Marion is dealing with a minor calf injury ahead of Game 2 on Sunday but he's still expected to play against the Warriors, the Akron Beacon Journal reports. Marion's calf issue can probably be chalked up to the normal wear and tear of a long regular season followed by a deep run in the playoffs. Assuming he takes on his normal playoff-role thus far, he's not expected to see more than 10 minutes of action Sunday.

Marion played four scoreless (0-2 FG) minutes in the first quarter of the overtime win against the Hawks on Sunday. He grabbed three rebounds. Marion replaced LeBron James in the first quarter since the Cavaliers' star was struggling from the field. The 37 year old did not look for his own offense and did not return to the game after James heated up.

Marion came off the bench to play six minutes in the Game 2 win over Atlanta on Friday. He scored two points (1-2 FG) with a rebound and an assist. Marion had not played in the last five playoff games. The 37 year old played a few minutes with Kyrie Irving (knee) out, but likely will be an observer only when the star guard returns.

Marion did not play in the last four games against the Bulls. He saw a combined 11 minutes in the first two games, but did not score. Marion appeared in two games against the Hawks in the regular season, both in the first six weeks of the season. The Hawks are deep in wings, so Marion could see a few token minutes in the Eastern Conference finals.

Marion played six scoreless minutes Monday in the loss to Chicago. Marion was limited to just one minute in the opening game of the playoffs, then sat for the next three wins over the Celtics. He should continue to get at least a little playing time Wednesday in Game 2.

Coach David Blatt indicated that Marion would see an increased role in the Cavs' second round series, Dave McMenamin of ESPN reports. Marion was one of three players Blatt mentioned would see increased roles - Kendrick Perkins and Mike Miller were the other two - as the Cavaliers prepare to move forth without Kevin Love (shoulder). With J.R. Smith also suspended for the first two games of the second round, the Cavs will be shorthanded on the wing, which is likely where Miller and, to a lesser degree, Marion will fill in. Marion began the season as an integral part of the rotation, but his minutes began to taper off as the season wore on, and he played just one minute in the Cavs' first-round series against Boston.

Marion has played a total of one minute over the course of the first three playoff games against the Celtics. Marion saw action throughout the regular season but it appears that he'll give way to a tighter rotation under coach David Blatt in the playoffs. Unless there's a rout in one of Cleveland's future games, expect the former UNLV standout to be stuck on the pine.

Marion started for LeBron James (rest) and had eight points (4-9 FG, 0-2 3Pt) and seven rebounds in 26 minutes in the loss to Boston on Sunday. After not playing regularly for nearly two months, Marion has played 47 minutes in his last two games. He may get more playing time in the last three games of the season as the Cavaliers attempt tor rest their starters.