When he displaced Lou Gehrig, the immortal "Iron Horse," as the game's all-time iron man, Cal Ripken Jr. set a bar so ridiculously high it likely never will be scaled.
Ripken's 2,632 consecutive games played are more than twice as many as any player in history, with the exception of Gehrig and his seemingly unapproachable 2,130. Everett Scott (1,307), Steve Garvey (1,207) and Miguel Tejada (1,152) complete the top five.
No threats to Ripken are found on the current landscape, but that doesn't mean there aren't a number of uncommonly durable, reliable players. The standouts, by position:
Catcher: Yadier Molina, Cardinals Salvador Perez of the reigning World Series champion Royals is on pace to catch the great Molina, but Yadier remains a marvel, having led the National League in games caught four of the past seven seasons.
Molina, despite a late-season thumb injury, appeared in 134 games in 2015, five fewer than MLB leader Perez. The Royals' rock also led in 2014 with 146 games behind the plate -- not including 16 in postseason play.
Molina, postseasons included, has averaged 136 games over his 11 full seasons as field general of the Cardinals. St. Louis has made the postseason nine times since his 2004 arrival.
First base: Anthony Rizzo, Cubs
Another force behind Kansas City's rise, Eric Hosmer has led the American League in games played at his position two of the past three seasons. But the Cubs' Rizzo leads the Majors with 459 games, 458 starts and 4,104 1/3 innings at first since 2013. Hosmer is third with 442 games, 431 starts and 3,848 2/3 innings.
Second base: Robinson Cano, Mariners
His power numbers have suffered in leaving the Bronx for Seattle, but Cano has continued to perform on a daily basis, gaining a respectful nod over the versatile Brian Dozier of the Twins and the irrepressible Jose Altuve of the Astros.
Dozier leads in games played (459) and Altuve in starts (454) the past three seasons, but Cano is right there, with 452 games and 451 starts. Ian Kinsler also doesn't like to sit: 437 games, 435 starts. Cano and Dan Uggla have led their leagues in games played three times, Dustin Pedroia twice.
Escobar and Ramirez led with 468 games, Desmond with 467 starts. Desmond leads in innings (4,136 2/3), with Escobar (4,128 2/3) and Ramirez (4,127) on his heels.
Third base: Kyle Seager, Mariners
The Dodgers are hoping Corey Seager is close to as durable as his big brother, Kyle. Seattle's Seager leads all MLB infielders the past three seasons in games played (477), starts (474) and innings (4,248). He has missed a total of 13 games in four seasons, leading the AL the past three seasons at the position.
Rebounding from knee surgeries in true Ripken tradition, the Orioles' Manny Machado played all 162 games in 2015: six starts at shortstop along with 156 at third. Rising Rockies superstar Nolan Arenado led the NL with 157 games at third.
Outfield: Hunter Pence, Giants; Adam Jones, Orioles; Nick Markakis, Braves
Since 2008, Markakis, Pence and Jones are 1-2-3 in games played in the outfield. Oblique, forearm and wrist injuries finally caught up with Pence in 2015, but only Markakis among active outfielder matches Pence's run of 161, 162 and 159 games from 2012 through 2014, leading the NL. Pence, Markakis, Matt Kemp and Ichiro Suzuki each have led their league in games played three times, Jones twice.