R. A. Dickey (20-6) became the 6th pitcher in Mets history to win 20 games, and the first since Frank Viola in 1990, as the Mets beat the Pirates 6-5. (Box Score)Dickey threw 128 pitches in 7.2 innings.  He gave up 3 runs on 8 hits, walked 2 and struck out 13.  He’s now tied for the league lead in wins (20), second in ERA by one point (2.69), and leads the league in strikeouts (222), innings pitched (227.2), complete games (5), and shutouts (3).  Definitely a Cy Young type of resume.The Pirates opened the scoring in the top of the second with 2 runs on 4 hits.  The lack of range in the Mets outfield contributed to the rally.  Travis Snider dropped a bloop single just in front of left fielder Scott Hairston.  Then Rod Barajas drilled a knuckleball over the head of Mike Baxter in right-center for a ground rule double.  That hit made it 1-0.  With runners at second and third, Jordy Mercer dribbled a grounder up the third base line.  David Wright charged in, but had no play at home.  He double clutched, and his throw to first was late, giving Mercer an infield hit.  Dickey then struck out pitcher Kevin Correia and Starling Marte to get out of the inning.The Mets got one back in the bottom of the second when Ike Davis led off the inning with a long home run into the bullpens, to make it 2-1 Bucs.  It was Ike’s 31st homer of the year.  Of his 112 hits this year, 54 have been for extra bases (31 HRs and 23 doubles).Later that inning, Snider reached into the Mo’s Zone and plucked a home run away from Mike Baxter.In the top of the fourth, Barajas tagged Dickey again, this time for a solo shot that extended Pittsburgh’s lead to 3-1.Once again, the Mets answered in the bottom of the inning when Scott Hairston singled home Daniel Murphy.  But they stranded two runners when Baxter and Josh Thole followed with consecutive ground outs.In the bottom of the fifth, Murphy’s RBI single tied the game.  The next batter was David Wright.  He belted a Correia (L, 11-11) offering into the bullpen in right-center to give R.A. Dickey and the Mets a 6-3 lead.  And for one, rare occasion, Citi Field got loud.It was David’s 21st homer of the year, and it upped his RBI total to a team-leading 91.After throwing 111 pitches, Terry Collins allowed R.A. Dickey to bat for himself in the bottom of the seventh.  The crowd gave him a raucous ovation, and Dickey responded with a leadoff infield single.  He then came out for the eighth and promptly struck out the first two batters he faced.  But when he walked Snider, his day was done.Dickey left the mound to more thunderous applause and chants of his name from the Citi faithful.As always, the bullpen turned it into a cardiac moment.  Jon Rauch got the last out of the eighth, but gave up a 2-run homer to Alex Presley to cut the Mets’ lead to 6-5.  Bobby Parnell (S, 5) came in to get the final two outs, the last on a line drive to Mike Baxter, who seems to have a knack for making big catches in big games.Citi Field was as loud as it has been in a long time.  And the Mets played more inspired than they have in a long time.  In a rough season, Dickey gave the Mets and their fans something to cheer about all year long.