Brittany Ghiroli of MLB.com reports that the Orioles have signed infielder Matt Antonelli, pending a physical. He is expected to receive a big league deal, according to Dan Connolly of the Baltimore Sun. Antonelli, who turns 27 next April, batted .298/.390/.457 with eight homers, 31 RBI and an .847 OPS over 374 plate appearances this season between Double- and Triple-A in the Nationals' organization. He hasn't appeared in the big leagues since 2008 as a member of the Padres and is unlikely to crack the O's Opening Day roster.