The Astros' Bud Norris, Jed Lowrie and Wesley Wright were among 133 MLB players who filed for salary arbitration Tuesday.

Norris and Wright are in their first year of eligibility. Lowrie's in his second.

Norris is expected to make about $3 million in 2013, while Lowrie will likely receive about $2 million through arbitration. Wright's expected to make about $1 million.

Astros general manager Jeff Luhnow said Monday that Houston is engaged in ongoing discussions with its arbitration-eligible players and contract extensions are a possibility.

MLB arbitration-filing list:

Player Team Position

Heyward, Jason AT OF

Martinez, Cristhian AT RP

Medlen, Kris AT RP

O'Flaherty, Eric AT RP

Prado, Martin AT OF

Venters, Jonny AT RP

Johnson, Chris AZ 3B

Kennedy, Ian AZ SP

Parra, Gerardo AZ OF

Pennington, Cliff AZ SS

Sipp, Tony AZ RP

Ziegler, Brad AZ RP