Aviles, 30, is a righthanded hitter who can play second, short and third. He is having a poor season offensively (.222 /.261/.395) but was decent last year (.304/.335/.413).
Aviles is hitting .309/.344/.600 in 55 at-bats against lefthanders this season. He is a career .296/.343/.464 hitter against lefties.
Navarro hit .216/.275/.351 in 16 games for the Sox. The 23-year-old is an athletic player the Sox seemed to be grooming as a backup. Volz, 23, has a 3.33 ERA in 30 games as a reliever for Class A Salem. He was their 9th round pick in the 2009 draft.
Aviles is a capable backup infielder who has a little speed. He will be active for tonight's game and wear No. 3. For the 2011 team, this is an upgrade on the bench.
UPDATE, 5:47 p.m.: Terry Francona spoke about the trade a little while ago.
"Kind of a guy I think our organization has kind of liked from afar for a while," the manager said. "When he came up, he was that guy that can really hit lefthanders. The ability to play second, short and third.
"Then he had the arm surgery that kind of slowed him down and derailed him for a while. But he can run, he can hit the ball out of he ballpark. How we would use him, I don't know. Again, some of it will depend on Jed (Lowrie) because Jed is not to far away. But he see,s excited to be here. We're happy to have him. At some point we'd like to get him in the outfield."
Aviles had Tommy John surgery on July 7, 2009, unusual for a position player. He missed the rest of the 2009 season but bounced back in 2010 and ws KC's regular second baseman. He was a backup this season and not as productive in that role.
Aviles is from Middletown, N.Y., and attended Division II Concordia College in Bronxville. As a senior in 2003, he hit .500 with 48 extra-base hits and 65 RBIs in 45 games and was named the Division II Player of the Year.
Francona said this trade does not reflect any uncertainty with Lowrie coming back.
"No," he said. "Jed's probably coming a little quicker than we thought. ... I just think this is a guy we've liked for a long time."
These stats from the Red Sox press release on the trade:
Aviles, 30, has played in 53 games with the Royals this season, with appearances at second base (20 games, 19 starts), third base (24 games, 22 starts) and shortstop (six games, two starts). The right-handed batter is hitting .357 (5-for-14) over his last four games and is 41-for-185 (.222) with 11 doubles, three triples, five home runs, 31 RBI, 14 runs, nine walks and 10 stolen bases overall with Kansas City in 2011, including posting a .309 clip (17-for-55) vs. left-handed pitchers. Aviles has also appeared in 35 games with the Royals Triple-A Omaha club this year, batting .307 (43-for-140) with eight doubles, two triples, nine home runs, 25 RBI and 21 runs, playing 34 of those contests at shortstop and one at second base. Selected by Kansas City in the seventh round of the 2003 First-Year Player Draft, Aviles has a .286 career average (328-for-1,148) with 57 doubles, 11 triples, 24 home runs, 122 RBI, 155 runs, 51 walks and 33 stolen bases in 301 Major League games with the Royals over parts of the last four seasons (2008-11). He earned Les Milgram Royals Player of the Year honors and was named to the Topps Major League Rookie All-Star team in 2008 after leading all Major League rookies with a .325 average (136-for-419).
The 23-year-old Navarro has played in 16 games with the Red Sox since he was recalled from Triple-A Pawtucket on June 30, appearing at third base (11 games four starts), shortstop (three games, 2 starts) and left field (3 starts). He has gone 8-for-37 (.216) at the plate with two doubles, one home run, three RBI, six runs and three walks. The right-handed batter also hit .258 (33-for-128) with eight doubles, two triples, five home runs, 13 RBI, 25 runs and 17 walks in 34 games with the PawSox this year while appearing at six different positions, including nine games at third base, seven at shortstop, five at second base, eight in right field, three in left field and one in center field. Signed by the Red Sox as an international free agent on September 25, 2005, Navarro made his big league debut with Boston last August and has hit .177 (14-for-79) in 36 career Major League games.
Volz, 23, is 2-3 with two saves and a 3.33 ERA (19 ER/51.1 IP) with 56 strikeouts and 12 walks in 31 appearances this season, all in relief for High-A Salem. He ranks third among Carolina League relievers with a ratio of 9.82 strikeouts per 9.0 innings and fourth with 21 games finished. Selected by the Red Sox in the ninth round of the 2009 First-Year Player Draft, Volz is 8-8 with two saves and a 3.60 ERA (67 ER/167.2 IP) with 150 strikeouts compared to 26 walks in 57 career minor league appearances, including 24 starts.