By the time this week's slate of games comes to an end, every team in baseball will have arrived at or passed the quarter mark of its regular-season schedule.
That in itself is a surprising fact, as it feels like the season only started a few weeks ago.
With roughly 25 percent of the 2013 regular season behind us, now is as good a time as any to take a look at the biggest surprises from early-season action—surprises of both the good and bad variety.
To give some perspective on what I believe constitutes an actual surprise and what doesn't, here are some examples: John Buck having hit more home runs than Prince Fielder is surprising; Chris Davis hitting for power and driving in runs is not. None of those players appear on the pages that follow.
With that in mind, let's take a look at which players (and teams) have forced us to stand up and take notice in 2013.
*Unless otherwise noted, all statistics are courtesy of Baseball-Reference.com and current through the end of games on May 14.