The Mets are due to face Tanner Roark, Gio Gonzalez and Doug Fister in the final road series of the season.METS (76-80, third place/NL East) vs. WASHINGTON NATIONALS (91-64, first place/NL East)
Nationals short hops
• Ryan Zimmerman returned to the lineup Saturday after missing 55 games with a Grade 3 hamstring strain. He started in left field -- a position at which he debuted June 3. Zimmerman, under contract for five more seasons, could shift to first base in 2015 with Adam LaRoche potentially headed to free agency, despite LaRoche’s production. The Nats and LaRoche have a mutual option for next season at $15 million.
• Gio Gonzalez is 3-1 with a 2.79 ERA in his last six starts. He has struck out 29 and walked seven in 38 2/3 innings during that span.
• At 4-0 in his career, Tanner Roark has more wins against the Mets than versus any other club.
• The Nats, fresh off a four-game sweep at Miami, own an NL-best 91-64 record and are holding off the Los Angeles Dodgers for home-field advantage.