Dunn impressed in his first bullpen session of camp Saturday, getting up to 95 mph with his fastball, Shannon Drayer of 710 ESPN Seattle reports.

Dunn's fastball has averaged a modest 91.4 mph through his first 14 big-league starts. His 4.13 ERA in those starts looks deceptively decent, but it's taken a .173 BABIP and an 82.0 percent strand rate to get him there, and his 38:31 K:BB doesn't bode well for sustaining the ERA. A velocity bump is exactly the sort of thing he needs to solidify himself as a reliable big-league starter, though he's not a lock to emerge from camp with a rotation role.

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