Sierra agreed Monday with Atlanta on a minor-league contract and received an invitation to MLB spring training, Chris Harris of the Mississippi Braves reports.
A former top prospect, Sierra has not been able to find success against major-league pitching, and he posted just a .442 OPS over 96 plate appearances in 45 games with the Angels last year. His speed and defense does give him an outside chance of making the major-league squad out of spring training, but it would assuredly be in a role that offers no fantasy intrigue.