Henderson Alvarez, the 22-year-old RHP for the Toronto Blue Jays, is good. He's posted a 3.26 ERA over his first 16 starts (105 IP), but he hasn't exactly dominated.
Alvarez has a 4.46 K/9 in his 16 starts, while posting a 54.8 percent ground-ball rate. He has allowed a batting average on balls in play of just .249, while opposing hitters are hitting just .243 against Alvarez to this point.
The young right-hander has gotten by with an impressive sinker. While his win-loss total is just 3-5 in his brief career, some fans and fantasy players will get excited by his current 2.83 ERA and 1.04 WHIP.
However, can you trust a guy with a 12:10 K:BB in 41.1 innings, or do you need to worry about luck running out? Alvarez is one of many players with impressive numbers without making guys swing and miss.