After all of the talk and the tweets and the trouble, Jordany Valdespin is finally getting a chance to play. With Ike Davis demoted to the minors, Valdespin will have his shot at extended playing time, his shot to show whether he’s an everyday player or just an enigmatic prospect. So far, the early returns aren’t all that good. Valdespin went hitless in his third straight game Friday night, a Mets’ 6-3 loss to the Cubs. If this is a trial run for Valdespin — whose immaturity and showboating has vexed teammates and foes alike — it is off to an inauspicious start. “That’s no pressure. You play hard, and if you have one bad day, you get it tomorrow. Just keep working and keep your head up,’’ said Valdespin, who went 0-for-3. “My swing is a little bit off because I didn’t play too much, but it’s coming. I work hard every day and it’s coming. A couple more at bats and we’ll see.’’ After Davis was sent to Triple-A, the Mets reshuffled their infield to get Valdespin’s bat in the lineup. After no playing for five of the previous nine games, he has started four straight at second base.