East Notes: Oliver, Davis, Roberts, Mets, Nats

This is the end of the line for Mariano Rivera and Andy Pettitte, but 2013 will also mark the final season for Blue Jays reliever Darren Oliver.  After 20 seasons, more than 1,900 innings and two near-retirements, the 42-year-old is ready to walk away from the game, writes Evan Peaslee of MLB.com.  Here's more out of the AL and NL East..

• Slugger Chris Davis says that he's eager to sign a long-term extension with the Orioles, tweets Rich Dubroff of CSNBaltimore.com.  Davis, who owns a .286/.369/.634 slash line on the season, avoided his first go-round in arbitration last winter by agreeing to a $3.3MM, one-year deal. 
• Orioles second baseman Brian Roberts says that he understands if the club opts not to bring him back for next season, writes Steve Melewski of MASNsports.com.  Roberts, who has been with the organization since 1999, has a has a .265/.341/.429 slash line with six homers over his last 41 games.
• OF all the Mets' free agents, LaTroy Hawkins is the most likely to return, tweets Adam Rubin of ESPNNewYork.com.
• Matt Williams refuses to comment on the possibility of him managing the Nationals, but people around him are more than happy to discuss his credentials, writes Adam Kilgore of the Washington Post.  
• Nationals GM Mike Rizzo says that the next manager of the club will have some input on the roster, writes Bill Ladson of MLB.com.  In addition to Williams, bench coach Randy Knorr and third base coach Trent Jewett are considered strong candidates for the job.
• Wally Backman, who was long rumored to be in line for the Mets' managerial job if Terry Collins was fired, is unlikely to join the coaching staff in 2014, tweets Andy Martino of the Daily News.  General Manager Sandy Alderson previously said that Backman would likely be offered a position inside the organization if Collins was brought back.