Hall, 28, made his MLB debut this past season, appearing in seven contests and posting a 6.48 ERA, 1.68 WHIP and seven strikeouts in 8.1 innings of work. He's spent his entire pro career coming out of the bullpen, posting a 2.58 ERA, 1.17 WHIP and 323 strikeouts in 289.0 innings pitched across all levels in five professional seasons.
Hall has flashed potential during his minor league career, and the Diamondbacks will be hoping he can live up to that potential and bolster a bullpen that was solid if unspectacular last season.
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