Nava signed with the Kansas City T-Bones of the independent American Association on Saturday, Jeffrey Flanagan of MLB.com reports.

EDGE Analysis

Nava appeared in 80 games for the Phillies in 2017, hitting .301/.393/.421. He did not appear at any level in 2018 while recovering from back surgery. He'll have a chance to return to affiliated baseball if he proves to be healthy and effective in indy ball, though at age 36, his chances of appearing in the majors again may be slim.

Nava (back) has yet to receive clearance to participate in baseball activities and is expected to return to his native Arizona to continue his rehab in the near future, Adam Berry of MLB.com reports.

EDGE Analysis

Nava, who signed a minor-league deal with the Pirates in the offseason, saw his bid for an Opening Day roster spot come to a close after requiring back surgery in February. With the 35-year-old having yet to even take batting practice in just about five months, it's looking increasingly unlikely that he'll play at any level in 2018.

Nava (back) had a minor setback and is no longer running, Rob Biertempfel of The Athletic Pittsburgh reports.

EDGE Analysis

He has not yet played in a game this year at any level after undergoing back surgery in late February, and now it sounds like he will be delayed even longer. Consider Nava, who is set to open at Triple-A once healthy, out indefinitely.

The Pirates reassigned Nava to their minor-league camp Monday, Adam Berry of MLB.com reports.

EDGE Analysis

It's merely a procedural move since Nava isn't expected to be at full strength until at least mid-May following back surgery in late February. The Pirates released Nava from his initial minor-league deal and re-signed him last week so as to avoid paying him a retention bonus, allowing the outfielder to continue to rehab in Florida under the supervision of the organization's training staff.

Nava (back) signed a minor-league deal with the Pirates on Friday, Liz Bloom of the Pittsburgh Post-Gazette reports.

EDGE Analysis

Nava underwent back surgery in late February which caused the Pirates to release the outfielder from his previous deal earlier this week. He will rejoin the club on a new contract with the hopes of returning to action around the middle of May. Once he's back to full health, it's expected that Nava will contend for a spot in the outfield with the big-league team.

Nava may agree to a contract with the Pirates in the coming days, Elizabeth Bloom of the Pittsburgh Post-Gazette reports.

EDGE Analysis

Nava was invited to attend the Pirates' spring training as a non-roster invitee. However, he suffered a back injury that ended up requiring surgery, which led to him being released by the team Tuesday. Despite being cut from the team, Pittsburgh hopes to sign Nava in the near future so that he can provide depth in the outfield and at first base when he returns to full health.

Nava (back) was released by the Pirates on Monday, Chris Cotillo of SB Nation reports.

EDGE Analysis

Nava underwent back surgery at the latter end of February and was unable to appear in any spring games for Pittsburgh. It's estimated that Nava will need 10-to-12 weeks to return to full health, which would project to him being available around the middle of May. If healthy, Nava could provide a club with organizational depth, as he hit .301/.393/.421 over 80 games with the Phillies last season.

Nava (back) underwent a microdiscectomy Tuesday in Arizona and has been ruled out for 10-to-12 weeks, Bill Brink of the Pittsburgh Post-Gazette reports.

EDGE Analysis

Though he inked a minor-league contract with the Pirates earlier in the winter, Nava was expected to vie for a platoon role in the corner outfield in spring training, but ongoing back discomfort prevented him from ever entering the competition. With the 35-year-old now expected to be sidelined through at least mid-May following the back surgery, there's a decent chance the Pirates cut bait with him entirely, given his status as a non-roster player.

Nava (back) is still hindered by his back discomfort during the early stages of spring training, Adam Berry of MLB.com reports.

EDGE Analysis

The 35-year-old missed time in the latter part of 2017 due to a lower back strain, and it doesn't seem like the issue is completely in the rear-view mirror. This could make it problematic for the non-roster invitee to crack the Opening Day roster if these problems continue to crop up. It's unclear how much this issue will hold Nava back during spring training, but things should become clearer as Cactus League play rolls along.

Nava signed a minor-league deal with the Pirates on Tuesday which includes an invitation to spring training, Ken Rosenthal of The Athletic reports.

EDGE Analysis

The switch-hitting Nava could be part of a platoon in left field if he wins a job out of camp. The veteran outfielder hit for a surprisingly strong .301/.393/.421 line in 214 plate appearances with Philadelphia last year. That line was backed by an unsustainable .357 BABIP, but even coming somewhat close to those numbers would make Nava a valuable contributor off the bench in Pittsburgh.