The Mets’ struggling rotation will be tweaked.

Tylor Megill, who has lacked consistency and often control, was optioned to Triple-A Syracuse on Thursday, according to the transactional wire, one day after he lasted just 2 ⅓ innings in a loss in Houston.

Megill, who entered spring training as a depth option, instead has started the most games of any Mets starting pitcher.

He was solid in April, worse in May and has pitched four times — twice well, twice poorly — in June.

After Megill walked 12 batters in 17 ⅓ innings this month, the Mets appear to have felt they had to make a change.

Megill said he was “pissed off” after the loss Wednesday, in which the Mets scored eight runs but he and the bullpen could not pull out a victory.

After the loss, which dropped the club to 34-40, pitching coach Jeremy Hefner said he thought Megill was “focusing too much on his mechanics. … He just needs to get back to who he was just throwing the baseball.”

Megill’s rotation spot will have to be filled Tuesday, when the Mets host the Brewers.

It is unlikely Jose Quintana, who has been expected to return in early July, will be ready yet.

The most likely internal replacement would be Joey Lucchesi, who was optioned in mid-May after five starts with a 4.43 ERA.

The lefty has pitched well with Triple-A Syracuse, allowing two runs in 13 ⅔ innings in his past two outings.

Jose Butto also could be an option, though the righty has a 7.63 ERA in his past seven starts with Syracuse.

A wild card would be Mike Vasil, the club’s No. 8 prospect who recently was promoted to Triple-A after posting a 3.71 ERA in 10 Double-A Binghamton starts.

Vasil, though, has allowed seven runs in his first 6 ⅔ innings with Syracuse.