Only a few knuckleballers come around per generation, so I was pleased to learn the Mets were on the verge of signing one Tuesday. R.A. (Remarkable Athlete) Dickey has kicked around several organizations since first surfacing with Texas in 2001 and like many knuckleballers, developed the pitch only after his other stuff (including elbow ligaments) abandoned him.

The Mets' have employed but two pure knuckleballers in their history. The first was righthanded reliever Bob Moorhead, who developed the delivery while on the road back to New York following a string of injuries (including, ironically, breaking two knuckles by punching a Sportsmans Park dugout door in frustration after a 1962 outing). Moorhead's other distiction was having been the first relief pitcher ever called on in a Mets game. Moorhead wore 22 as a knuckleball dabbler in 1962 and 21 as a specialist in '65. The Mets' last pure knuckler, Dennis Springer, was released shortly after taking a pounding from the Reds on a frigid, wet, windy April evening at Shea in 2000. He wore No. 34.

Other Mets have included a knuckler as part of their repetoire, including relievers Jeff Innis (who threw his sidearm); Dave Roberts; Tom Sturdivant; Frank Lary; Warren Spahn; Bob McClure and Todd Zeile, whose whole pitching career was something of a stunt. Dave Mlicki threw a knuckle curve.

The Mets for a time were developing potential knuckleball throwers in the minors. One, Zac Clements, was a converted catcher who appears to have topped out at AA Binghamton in 2006. Charlie Hough, a longtime knucleball hurler, was the Mets pitching coach in 2001 and 2002.

Dickey in the meantime only signed a minor league contract, and has had only sporadic success in the majors to recommend him, but I'l be rooting for him just the same. Knucklers of recent vintage including Tim Wakefield and Tom Candiotti wear No. 49 so as to honor Hoyt Wilhelm, one of the giants of the craft. The Mets' current tenant of 49 is lefty Jon Niese.

So this is turning out to be a better week than it looked like it might be back on Tuesday, what with an impressive debut starts from Mike Pelfrey and Nelson Figueroa; the first Metly appearance and contribution from Raul Casanova; and a continued MVP bid from Angel Pagan. There's something satisfying knowing that all these guys are one-time products of the maligned Mets farm system.

Figueroa's victory last night marked the first appearance of the dreaded black unis all season (not to mention the first call for a tailor to get Figueroa's jersey to fit right. Looked like a size 44 wearing a 52). Correct me if I'm wrong, but we've yet to see pinstripes and/or the gorgeous all-blue Mets cap yet. Speaking as a neighbor of hundreds of young hipsters, the latter is becoming the new trucker cap around here: I'll try and gather photographic evidence and show you in a future post.

Nice to see the Mets honor Shea (that's my wife's maiden name, doncha know?) but leave it to the incomparable Paul Lukas to point out they did so while introducing unnecessary black dropshadows to the logo and accompanying retired numbers.

* Thanks to Eric Simon of Amazin' Avenue (and his readers) for the enthusiastic book review he published recently. See also a nice note from author, reviewer and Yankee fanatic Harvey Frommer. And Mark Lelinwalla of the NY Daily News did a short peice on the book's creation in The Score column last week.

* I'll be at two great independent bookstores next week to sign and discuss the book: On Wednesday, Bookends in Ridgewood, N.J.; and Thursday at Word Books in Greenpoint, Brooklyn.

On the first day active rosters can be expanded the Mets as expected recalled AAA starters Mike Pelfrey and Phillip Humber, along with a lefty reliever, Willie Collazo. Pelfrey to wear No. 34 as usual, will try for his first victory of the year in a start this afternoon in Atlanta. Humber will wear the same No. 49 he wore last season in brief appearances.

Press notes say Collazo will debut in No. 36 — a jersey that earlier this year went to outfielder Chip Ambres. Ambres reportedly is among others who may still be recalled as the month rolls on.

The Mets in the meantime put together a solid game Friday in ending an ugly five-game losing streak. Among the casualties of the Philly sweep was Orlando Hernandez, who is expected to miss his next turn in the rotation resting a sore foot. The leading candidate to take his place is some guy called Martinez.

Looks like we’ll have to wait until tonight’s game in Milwaukee to see what number new second baseman Luis Castillo alights in, though we’d be very surprised if it’s not his familiar No. 1. Castillo was acquired yesterday for two minor leaguers with dubious futures, so we can’t get too excited over Castillo, a chubby slap-hitter, especially while Ruben Gotay 6 iseems to have so much thunder in his bat. That said we’re on board with the upgrade in defense and the stability Castillo ought to bring to the lineup everyday.

Nor is the exciterment too high over the fact that Carlos Beltran 15 will be out of action for another 2 or 3 weeks (maybe 4). (Maybe 5). (Who knows). That the Phillies and Braves have been very aggressive at the deadline so far seem to indicate they’re ready to fight this thing to end. Still waiting to hear how the Mets will work out the roster, and there’s still 4 more hours to make a non-waiver trade, so updates soon.

Paul LoDuca’s Saturday injury and the recent demotion of Sandsy Alomar Jr. meant the Mets on Sunday recalled Mike DiFelice for the umpteenth time in the last three years (Umpteen = 4). The news here is that DiDelice is in his third uniform number (9) after previous stints in 33 (2005) and 6 (2006). Mike Pelfrey 34 was sent down to make room.

Yet another struggling outing Saturday left Mike Pelfrey 34 with an 0-5 record and a ticket to New Orleans. The Mets demoted the lanky righthander and in his place recalled outfielder Carlos Gomez, who according to the Mets, will wear No. 27 for this afternoon’s game. Gomez was leading the PCL with 17 stolen bases and could be seen in the short term as insurance for Moises Alou 18 and whatever joint is troubling him this week.

Gomez is poised to become the 24th No. 27 in Mets history. Darren Oliver wore 27 most recently.