Snake bites

• The D-backs announced Tuesday that they have traded Triple-A Reno utilityman Mark Teahen to the Cincinnati Reds for cash or a player to be named later.

The 31-year-old veteran has hit just .209 with no homers and five RBIs in 21 games with Reno.

• The D-backs signed outfielder Juan Rivera to a Minor League contract on Tuesday. The 12-year veteran was last with the Yankees in Spring Training before being released.

In 109 games with the Dodgers last season, Rivera hit .244 with nine homers and 47 RBIs.

• Aaron Hill, currently on the 15-day disabled list with a broken left hand, had his fractured bone examined Tuesday and the doctors kept him in a splint. The second baseman will be reexamined next week to see how much the bone has regenerated before moving forward with the rehab process.

• Since April 12, Miguel Montero has hit just 8-for-56 and has seen his batting average drop from .265 to .198 over that span. Still, D-backs manager Kirk Gibson is confident the catcher will break out of the slump.

"He hasn't had the results, but he has hit the ball better," Gibson said. "Just like anybody else that is struggling, it takes a life of its own and it becomes more than it should. When you get in a slump, the danger is that you think too much about it. But there's nothing you can do about it, the key is trying to block it out. The good ones do that, he's a good one and so that's what he does."

• In celebration of Dia de los Niños (Children's Day), a handful of Arizona's players hosted and chatted with a group of kids from a local Si Se Puede learning center on Tuesday during batting practice.

The players included Montero, Alfredo Marte, Wil Nieves, Gerardo Parra and Martin Prado.

Earlier in the day, Montero also visited children at the Maricopa Medical Center in Phoenix.

While Children's Day in the U.S. is held in June and isn't as popular as Mother's or Father's Day, in Mexico the holiday is widely celebrated every year on April 30.

Tyler Emerick is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.