"From a setup standpoint, I feel you have to have at least two and from the left side, he's most definitely one of those guys," Mariners manager Eric Wedge said. "He's consistently gotten better all year."
The 26-year-old lefty posted a 7.50 ERA in six April innings, but in 21 1/3 innings since, he's allowed just two earned runs. The lefty currently is riding a scoreless streak of 14 1/3 innings, dating back to May 17.
"He's a strong competitor, he has a great focus out there and he's done a great job of making adjustments along the way," Wedge said. "I've always said he has a bit of an edge to him. It might be a quiet edge, but there's an edge, no doubt."
Tuesday night against the D-backs, Furbush earned the win after pitching perfect eighth and ninth innings, stymieing an Arizona offense that collected 14 hits in the game. Four of the six outs he recorded came via a strikeout.
"He was very impressive last night," Wedge said. "It wasn't just with his fastball, it was with his secondary stuff too."