In the expected moves, the team reinstated Daniel Hudson, Matt Reynolds and Cody Ross from the 60-day disabled list to the 40-man roster - a necessary action over the winter, even if there's a good chance that none of them will be back by Opening Day 2014. The team also lost Chaz Roe to the Texas Rangers, but picked up outfielder Matt Tuiasosopo, who was left available by the Detroit Tigers. First things first: it's pronounced too-ee-ah-suh-SOH-poe. I'd recommend that you start pronouncing that now.
Tuiasosopo was a third-round pick by the Mariners in 2004, and made his debut for them in 2008. They released him at the end of 2011, and he spent 2012 with the Mets organization, but didn't appear for them in the big leagues. This year, however, he spent the whole year with Detroit, after they signed him as a free-agent in November. He earned an Opening Day roster spot in spring training, despite a frightening experience at the birth of his son. Over 81 games, he started 47 games, all of them in left-field, and put up a line of .244/.351/.415, good enough for an OPS+ of 106.
He had seven home-runs on 164 at-bats, but didn't make the Tigers' post-season roster, losing out to Jhonny Peralta after finishing the year in an 0-for-22 slump, part of a second half where his OPS was only .429. With less than 200 major-league at-bats over the past three seasons, it's hard to say whether there could be any value for the Diamondbacks here, or if Tuiasosopo is intended just to be roster filler for Reno. Our colleagues over at Bless You Boys don't seem particularly perplexed, but I imagine if, as noted above, Cody Ross is not ready to return, Matt could provide a right-handed alternative.
The moves leave the Diamondbacks' 40-man roster at 39, although you can expect some more shuffling to take place there, between now and the Rule 5 draft occurs on December 12.