It's not easy for players to break out in the opening week of MLB spring training.
After all, most position players have only accumulated a handful of at-bats, and most pitchers have only made one appearance. Then again, Masahiro Tanaka only needed a single pitch—or splitter to be exact—to prove that he's for real.
So, here's a look at Tanaka and nine others who have already demonstrated that they're ready to become breakout stars in 2014.
Note: All stats courtesy of Baseball-Reference.com. All videos courtesy of MLB Advanced Media.