Can you guess the one player to play for all four teams in the Championship Series?

There are only four teams left in the postseason, with the Red Sox, Astros, Dodgers and Brewers battling it out for World Series supremacy. And only one player in baseball history has played for each of them. Today, we're going to see if we can help you guess who that is. 
If you already know the answer, feel free to scroll to the bottom to check your answer. And if you don't know the answer, we have a few hints below to help you out. Just flip the cards over to get them. 
See if you can figure it out using the fewest hints, and tweet us @Cut4 how many it took you.
Think you know the answer? Good: The answer is Mark Loretta. Check out some of his best moments with the four teams below: