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The Diamondbacks selected Thompson's contract from Triple-A Reno on Sunday.

Arizona designated right-hander Nabil Crismatt for assignment to clear room in the bullpen for Thompson, who could make his Diamondbacks debut in Sunday's series finale with the Reds. Before inking a minor-league deal with Arizona earlier this month following his release from Tampa Bay, Thompson had produced a 6.11 ERA, 1.19 WHIP and 12:7 K:BB in 17.2 innings at the big-league level with the Rays this season.

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