The move continues a huge shakeup of a Braves' bullpen that has seen the team part ways with Hale, Schlosser, Jordan Walden, David Carpenter, Anthony Varvaro and Chasen Shreve in order to add Jason Grilli, Michael Kohn, Arodys Vizcaino and Josh Outman this winter. The team will retain Luis Avilan, James Russell and Shae Simmons in front of closer Craig Kimbrel.
Hale, 27, appeared in 45 major-league games for Atlanta last season, posting a 3.30 ERA in his second major-league season. He profiles as a middle reliever for the Rockies, in front of Boone Logan and LaTroy Hawkins at the back end of the team's bullpen.
Schlosser, 26, has had an interesting offseason, being non-tendered and re-signed by the Braves before being included in today's trade. He made fifteen major-league appearances with Atlanta last year, posting a 7.64 ERA, and will not join the Rockies' 40-man roster.
Briceno, 22, spent last season with Single-A Asheville, hitting .283/.336/.476 with twelve home runs and 50 RBI. The Venezuelan-born backstop was ranked by Baseball America as the Rockies' 29th best prospect before the 2014 season, and is known as an offense-first catcher.
O'Dowd, 24, is the son of ex-Rockies' general manager Dan O'Dowd and spent last season with High-A Modesto and Double-A Tulsa. He is considered a non-prospect, and hit .271/.335/.385 in 113 games last year.