James Harden mural taking shape across Flatbush from Barclays Center

When workmen showed up Wednesday across from Barclays Center, it didn’t take long for onlookers, including fans, to figure out what was going on. Giant murals of James Harden were being painted on the three sides of the former Triangle Sports building at Flatbush Avenue and Fourth Street.

Anthony Puccio was first to tweet about it.

Kyle Diangkinay posted images as well ... suggesting that the mural is probably an adidas promotion...

Not long after, Harden himself seemed to confirm, re posting Diangkinay’s images.

It shouldn’t be a surprise. After all, Harden is in the midst of a 13-year, $200 million endorsement deal with adidas.

Shortly after 4 p.m., the mural really started to take shape around the abandoned building, as our Alec Sturm posted...

Other fans played tourist as well... like this from Hoodie Harden (@hardenbbq)...

By nightfall, the text accompanying the image of Harden was visible...

If indeed it is adidas, it won’t be the first time a Nets player got a mural from his footwear sponsor. Last year, Kyrie Irving got the mural treatment.

That was Nike, of course.