Mets knuckleballer R.A. Dickey would like to extend his run at Citi Field.Dickey will try to win his third consecutive home start Sunday when New York and the Arizona Diamondbacks conclude their series.After Saturday's 4-3 victory put the Mets (14-13) back in the win column for the first time since a 5-1 run moved them a season high-tying four games above .500 on April 29, the club concludes its brief three-game homestand with Dickey (3-1, 4.45 ERA) on the mound.The veteran right-hander took a no-hitter into the sixth inning of his last start -- Monday's 4-3 loss at Houston -- but he didn't make it to the seventh after giving up three runs."But I had no business not going into the eighth or ninth with the stuff I had (Monday)," Dickey told the Mets' official website. "It was just unfortunate that I gave up some runs and had to come out of the game, because I was only at (77) pitches and I felt fantastic."Dickey has been outstanding in two home starts, going 2-0 with a 2.08 ERA with opponents batting .174.He'll get his second look at the Diamondbacks after giving up three runs in seven innings of a 3-2 loss in Phoenix on July 20, 2010.Arizona (14-14) counters with right-hander Trevor Cahill (2-2, 3.13) as it tries to finish its 10-game trip with six wins.The first-year Diamondback takes the ball after throwing 7 1/3 innings of one-run ball in Tuesday's 5-1 victory over Washington. Cahill struck out five and walked one after giving up 12 free passes in his first four outings."That's the best he's thrown for us," manager Kirk Gibson told the Diamondbacks' official website. "Much more into the zone, commanding the zone early and often, and when you can do that, you can get early swings, and he got some early outs and kept his pitch count down."Cahill is 2-0 with a 1.31 ERA in three road starts.He'll face David Wright for the first time after the Mets third baseman had his 10-game hitting streak snapped with Saturday's 0-for-4 effort.It's uncertain if Cody Ransom or Ryan Roberts will start at third for the Diamondbacks in the series finale. Ransom hit a two-run homer and a go-ahead single in the eighth inning of Friday's 5-4 victory at Citi Field, and Roberts went 2 for 3 with a solo homer Saturday."I think the more you mix it up, the stronger your team becomes in the end," Gibson said Saturday before the Mets ended their four-game skid to Arizona.Miguel Montero could be behind the plate for the Diamondbacks on Sunday after Henry Blanco started Saturday.Catcher Mike Nickeas made a case for more playing time with a two-run single Saturday, but starter Josh Thole is expected to return to the Mets' lineup in the finale.As could slumping first baseman Ike Davis, who was a ninth-inning defensive replacement Saturday after going 0 for 4 with an error in the series opener.Center fielder Andres Torres, who has driven in at least one run in each of the last five games, is the only active Met to have faced Cahill. He is 2 for 9 with two doubles in that matchup.