Mike Trout can't outrun him. Giancarlo Stanton can't hit enough home runs to drive him from the game.
Father Time is always hanging around the ballpark, and sooner or later, he shows up at every player's locker in the clubhouse, dropping hints that the end is near.
Some players, like Mariano Rivera, choose to hear his message, leaving the game on their own terms while still performing at a high level. Others are a bit more stubborn, hanging on until each of the 30 doors in baseball have been closed to them. Even then, some players still can't give up the dream.
But for some veterans still staking a claim to a spot on a team's 25 or 40-man roster, their days are numbered, and they are soon to be replaced by younger, more athletic alternatives.
While most consider "Over-the-Hill" to be someone closer to the age of 40 than the age of 30, the fact of the matter is that plenty of 30-somethings have lasted well past the time when they were useful, everyday players.
Sure, the players who made the 2013 "Over-the-Hill" team can still produce a big hit or a make a solid defensive play here and there, but asking these players to take the field for any extended period of time is asking for trouble.
So who made the cut? Let's take a look.