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Duffy is a hard-throwing lefty.
Danny Duffy has electric stuff, but his control is the biggest issue. If he can get that in check, he could be a very nice addition to any fantasy staff.
Duffy is a 25-year-old lefty who throws a 93 mph fastball. The strikeouts aren't a problem, but with them come the walks. Duffy had a respectable 7.43 K/9 in 20 MLB starts a year ago, but he also posted a 4.36 BB/9.
In his first start of the year, Duffy did much of the same: eight strikeouts and four walks. He worked, however, around the walks by giving up no runs in six innings.
Duffy is an interesting option. It's probably not safe to add him now, but keep an eye out for him. He's capable of big things.