Joe Nathan (about to be) off the board

Joe Nathan is likely heading to Detroit, which means David Robertson is a step closer to being Mariano Rivera's replacement.

The Yankees have been talking with Nathan's agent.

They still have interest in Grant Balfour and could be in play for the non-tendered John Axford or Andrew Bailey. Here is the rest of the breakdown of the closer situation that I put together last week. Balfour would appear to be the biggest challenge to Robertson.

Balfour had a very good season in Oakland as the closer, but is he better than Robertson? To me, if Balfour comes in as the closer, Robertson taking his job will be a possibility throughout the season.

Balfour, 35, had 38 saves and blew just three in 2013, but he only earned 34 saves in his entire career before that. Balfour made $4.5 million. I don't really see him as a fit unless he and Robertson are battling for the closer role.

Here is the latest ESPN story on Nathan.