Bryce Harper has not spoken about his reported shoulder injury during the postseason, but Scott Boras hinted that there is something bothering the Washington Nationals outfielder.

"He's obviously played with limitations at times this year, no question," Boras said. "... It's a very different year when you lead the league in walks and intentional walks, making the adjustment about how to handle how the league's decided to take away what you normally have instead of challenging you."

Harper is 3-for-14 with four walks in four NLDS games against the Los Angeles Dodgers and has shown no limitations in the field or while running the bases.

"There's a lot of things that go on when you're a star player at a young age," Boras said. "It's kind of like high school. When you're a great player, your sophomore year is often your best year. Maybe your junior year. Not when you're a senior, because they stop throwing to you. You have to make that adjustment. The major leagues have made that adjustment, and he's evolving to it. There's a physical and a psychological component to that."