The gang head to Arizona to watch some spring training baseball. P.J. writes about the beginning of baseball season in order to keep all her bases loaded, but comes down with a case of writer's block. Meanwhile, Brendan has caught the eye of a player's girlfriend, and a lonely Andy remains back in Chicago.

The gang's dynamics are stirred up when PJ forms a bond with one of Stephanie's friends. Elsewhere, Kenny and Mike make friends with a customer, a counselor which Andy can't stand. Meanwhile, Brendan deals with a new business partner who is unreliable.

The guys figure how to make Facebook and the internet work for them, but a romance may need to be rebooted after Bobby learns way too much information about PJ on there. Elsewhere, Mike and Brendan each try to find out as much information on a comely woman as possible, Mike by use of the internet and Brendan by use of old technology.

Spring fever hits the Windy City as springlike warmth during the middle of winter prompts PJ and Bobby to hold a picnic in the park...but a crucial life decision complicates the outing. Meanwhile, Kenny begins a new relationship, and Mike tries vainly to emulate actor Mathew McConaughey by buying a dog and a Jeep.

Brendan lets PJ make all of his decisions for a week.

PJ and the gang are ready for their annual board-game contest, but PJ finds out that Bobby thinks she is too competitive. Elsewhere, he boys are used as Stephanie's guinea pigs for an article, which probes how men behave when women are not around.

PJ is uncertain of why she received her new promotion, was it for her work or because of her looks? Elsewhere, Mike and Kenny get a look at the lusty life of club owner Brendan. Also, Andy gives Bobby pointers concerning women.

PJ is glowing over her new romance, but discovers it is difficult in keeping it a secret. Meanwhile, Brendan works on plans for the nightclub. Now that the mustache-growing contest has ended, Mike decides he is keeping his.

Dramas are swirling around Bobby and his impending marriage to Elsa, the Swedish nanny. Meanwhile, PJ's fling hits an obstacle with Bobby's brother; the boys compete in a mustache growing contest; and Andy welcomes a new member to his family.