Details have emerged as to why Francisco Rodriguez, the hot-headed Mets’ closer, beat up his common-law wife’s father (even though the lady has two kids with Rodriguez, they aren’t married) and was arrested for assault late Wednesday night at Citi Field.

According to the NY Post, after Rodriguez was done cursing at reporters, he went to the Family Lounge and called his wife outside.

The troubled couple, parents to boy-girl twins less than a year old, started arguing, with K-Rod viciously cursing at the woman, dropping F-bombs right and left, sources said. Carlos Peña came out into the hallway tunnel and stood up to the bad-tempered ballplayer. Rodriguez, 28, attacked the older man as if he had just charged the mound, officials said. Security guards allegedly had to pull Rodriguez off the dad. Officials said Carlos Peña suffered a frontal-lobe hematoma, contusions and abrasions in the attack.

K-Rod lived with the mother of his kids and her father, but now that both have restraining orders against him, he’s either slumming it on the couch of a teammate or sleeping in the clubhouse. The Mets only suspended him for two days, which is a joke. Even the Mets’ announcers are coming down hard on the team.

[UPDATE: The Daily News paints a slightly different picture. It claims K-Rod was angry after the game, and his girlfriend's father told him to "man up," which set off the fight.]

Mike Francesa was on the radio yesterday, ranting about how the Mets could/should trade Beltran and K-Rod now that the season is over (nine games out in the NL East; eight games back in the Wild Card race). It’ll result in a typical Mets’ move, the only way the other New York team knows how to do business – buy high, sell low. We’ll project a 25-25 year for Beltran next year for an American League team, and if K-Rod isn’t busted for anything else, he’ll probably ring up 40+ saves closing for [enter team here].