It appears its only a matter of time before Jeff Duncan ditches the ridiculous No. 61 jersey he’s been wearing since his recall from Binghamton. But the rookie outfielder told The Post on Tuesday he’d let his bosses decide: “I’m not going to say anything about [the uniform number] until they change it for me … [but] my first preference is 12. You guys gonna help me out?” Sure, why not. Just promise not play like the last guy who wore that number.