There are three constants in life: Death, taxes and Kyrie Irving winning first-round playoff games.

The Boston Celtics completing their sweep of the Indiana Pacers on Sunday means Irving still hasn't lost a first-round playoff game in his NBA career, moving to a perfect 16-0 over four series sweeps between the Cleveland Cavaliers and Celtics.

If you think that's unprecedented ... it is.

The @celtics complete the sweep of the Pacers behind Kyrie Irving's 22.5 PPG and 7.8 APG in the series.



Irving is now 16-0 in opening-round playoff games, the only player since the NBA-ABA merger to play in at least 10 opening-round games without losing.#STATSInsights pic.twitter.com/lOVJCD4eKh — Stats By STATS (@StatsBySTATS) April 21, 2019

The Milwaukee Bucks took the Celtics to seven games in the first round last year, but Irving was sidelined with a knee injury. Before that? The All-Star guard helped power the Cavs to first-round sweeps in 2017, 2016 and 2015 (over the Celtics).

Irving's remarkable playoff success isn't limited to the first round, however. Get this: With a 50-game minimum qualifier, Irving has the highest playoff percentage of any player in NBA history (now .768 after Sunday's win.)

Kyrie has the highest playoff winning percentage in NBA history



- 76.4%

- Min. 50 games



(H/T NBA Countdown) pic.twitter.com/4tKTtYWmwC — Bleacher Report (@BleacherReport) April 21, 2019

If you're looking for some fun (and totally apples-to-oranges) context, Irving's winning percentage is also higher than that of the best quarterback in NFL history.

Playoff win%...

Kyrie Irving: 43-13 (.768)

Tom Brady: 30-10 (.750) — Tucker Boynton (@Tucker_TnL) April 22, 2019

Of course, Irving benefited from having LeBron James on his team during three consecutive NBA Finals runs from 2015 to 2017. But the Robin to James' Batman still was pivotal to Cleveland's playoff success. After Irving injured his knee in Game 1 of the 2015 NBA Finals, the Cavs lost three of their next five games to fall to the Golden State Warriors. The following year, however, a healthy Irving buried the game-winning 3-pointer in Game 7 to lift Cleveland to an NBA title.

So, when Kyrie kept saying he couldn't wait until the playoffs and raved about the Celtics' potential once the "real games" started, it turns out he had some proof to back up his boasts.

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