Top 10 sustainable breakthroughs 

August, 26, 2014
Aug 26
9:08
AM ET
Yan Gomes, Jake Arrieta & Adam EatonGetty ImagesMany "breakthroughs" are more products of small sample sizes or good luck. These appear different.
For these breakthroughs, I considered:

• Players who were no longer rookies to start 2014.
• Players who either established a substantially higher level of performance, or who established themselves as everyday players/mid-rotation starters when they were previously part-time or extra players.

While many other players had apparent breakouts this year (e.g., Josh Harrison), these 10 players all have had breakouts that I believe are sustainable into future seasons. I picked five starters and five position players.

Pitchers

Garrett Richards

Unfortunately, Richards' season is over due to a freak knee injury that might put him out of action into spring training of 2015, which hurts the Angels' chances of advancing in the postseason and overshadows what an amazing year he's had. Richards was throwing mostly four-seamers and sliders before this season, which made him vulnerable to left-handed batters and generally to hard contact when he left the fastball up. This year, he added a two-seamer, with more life than the four-seamer (which has some natural cut) and a different look, while also adding a curveball to complement the slider, a pitch with similar shape but lower velocity. Assuming his knee allows it, he'll return to ace status next year.