Diaz, whose nickname aptly conveys his notable presence on the mound, has thrown 168 total MLB innings over the past four seasons. After three years with the Reds, he pitched last year for the Rays. In the aggregate, he owns a 4.02 ERA with 9.2 K/9 and 3.5 BB/9.
While Diaz cracked the active roster out of camp, and delivered his fastball with its typical zip, he was touched for 19 earned runs in thirty frames before being designated for assignment. At his best, Diaz generates a healthy volume of harmless infield pop-ups along with a decent number of swings and misses, though he sat at a below-average 10.4% swinging-strike rate (as against other relievers) in 2017.
For the rebuilding Marlins, players such as Diaz offer the possibility of useful output at a bargain price. It would appear that the 33-year-old has a solid shot at earning a roster spot in Spring Training.