Former MLB star Jose Canseco is trying to cause trouble in paradise for the newly engaged Jennifer Lopez and Alex Rodriguez.

A day after the celebrity couple announced their engagement, the former New York Yankee took to Twitter to accuse his fellow Yankee of cheating on Lopez with Canseco’s own ex-wife, Jessica.

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Canseco, who divorced from Jessica in 1999, claimed that he was with his ex-wife when she received a call from Lopez’s now fiancé.

He also tweeted his phone number to J-Lo urging her to call him to know “the truth,” and then called A-Rod a “piece of s**t” before challenging him to an MMA fight.

Neither Lopez or Rodriguez have responded to Canseco’s accusations, but Jessica Canseco has taken to Twitter to call BS on her husband’s accusations.

“Those false accusations Jose is making are not true,” she wrote on Twitter. “I have known Alex for many years and haven’t even seen him for over 5. I certainly did not sleep with him. I am friendly with both him and Jennifer. As for Jose he can keep playing with his Alien friends.”

She added a followup to reveal why it took her a whole day to respond. “In fact I don’t even get on twitter had to download app again and don’t watch tv and had no idea any of this was going on,” she wrote in a second tweet. “Last time I saw Alex he was with Torrie [Wilson] and I brought my boyfriend over for dinner. We are just friends my god.”

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The couple announced the proposal on Saturday in an Instagram photo showing off Lopez’s impressive diamond engagement ring.

“She said yes,” A-Rod captioned the snap.

View this post on Instagram

she said yes ♥️

A post shared by Alex Rodriguez (@arod) on