Parnell feels 'night and day' versus 2015

(Photo: Jeff Roberson Associated Press)LAKELAND, Fla. -- Bobby Parnell just wants to be healthy.

And if he is, the right-handed reliever could pay big dividends as a Detroit Tigers lottery ticket.

Parnell, who signed a minor league contract Thursday, was at Joker Marchant Stadium today for the first full day of formal workouts for Tigers pitchers and catchers. The former New York Mets closer said he feels “night and day” compared with this time a year ago.

Parnell, 31, struggled with a 6.38 ERA and 1.95 WHIP in 2015. But he was just one season removed from elbow ligament reconstruction surgery and, in the four seasons that preceded his injury, he posted a 2.79 ERA with 202 strikeouts in 213…