A/N: Thank you to everyone who reviewed, favorite, or followed this story. They really mean a lot, especially because this is my first fanfic. Again, if you have any suggestions for plot lines in this story, please let me know. I hope you enjoy this chapter. R&R!

Casey pulled up to the curb, unlocking the door to let KJ out.

"You're coming to my first game today, right?" KJ asked her brother as she unloaded her backpack out of the car.

"Right after I get off shift, I promise," Casey said, kissing his sister on the head.

"Bye Matty!" KJ waved as she started to walk away.

"Bye, baby girl," Casey waved back, starting up the engine again. To be honest, he wasn't sure how this day was going to go. That kid who beat up KJ had been on his mind ever since she had come home a few days prior. He needed to show him what would happen if he ever touched his little sister again.

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Everyone at Firehouse 51 decided to surprise KJ at her first varsity game after shift. But, it wouldn't be a Firehouse 51 entrance unless it resulted with the complete and utter embarrassment of KJ. All of the guys, plus Dawson and Shay, piled into the two trucks and drove, lights and sirens included, to the baseball field.

KJ was warming up with her teammates on the field when she heard the sirens coming closer. Immediately, she knew who was coming, and whose idea it was. No one else could come up with such an embarrassing idea except for the one and only Kelly Severide. She smiled, a small chuckle escaping her mouth as she squatted down behind home plate, ready to help Jake warm up.

Everyone filed out of the trucks and went straight to the bleachers, all sitting in the front row.

"Let's go KJ!"

"Yeah Junior!"

"Show these boys how it's done!"

KJ rolled her eyes, feigning annoyance, knowing they would cheer like through the whole game. However, secretly she was thankful that she had such a great support system, especially with the absence of her parents.

"Hey KJ! That your family?" Jake asked from the mound, winding up to throw another pitch.

"Yeah, something like that," KJ smiled, easily catching the 85 mph pitch that was thrown directly to her. "Balls in, coming down!" KJ yelled, letting her teammates know the game was about to begin.

"Well in that case," Jake said. "Show them what ya got."

KJ closed her glove around the ball, quickly stood up, and chucked it as hard as she could to second base. She could hear them cheer even louder, and then looked up to Jake, who just smirked and winked at her.

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KJ's first game on varsity was definitely one to remember. They were tied in the bottom of the ninth, with two outs. KJ was up, and worked the count to 3-2. Everyone held their breath as the next pitch was thrown, a curveball inside. KJ adjusted her stance, and connected! The ball went deep into the outfield as KJ rounded first, then second, and finally third. The dugout was going crazy as she sprinted home to try and beat the throw. She slid into home, colliding into the catcher, who then dropped the ball. She was safe and the Gators just won their first game of the season! All of her teammates came pouring out of the dugout, easily lifting KJ up and carrying her off the field, towards the lockers. All except for one.

Casey noticed this, and separated himself from the rest of the pack. He slowly approached the only kid who was still in the dugout, packing up his bag. As Casey moved closer, he noticed the kid had a still healing black eye. Casey smiled inside, knowing his little 110-pound sister could fight back, but also felt the anger rise as he realized this was the senior who had hurt her.

"Hey," Casey said as he stepped into the dugout, hands in his pockets (to keep himself from lashing out right away).

"Who the hell are you?" the kid asked annoyed, not even bothering to look up from what he was doing.

"I'm Matt Casey, KJ's older brother."

At this, the kid's head popped up, putting two and two together as to why KJ's brother would be here. "What do you want?"

"What's your name?" Casey asked, annoyed with this kid's attitude.

"Blake."

"Well, Blake, it seems that you got into a little skirmish with my sister earlier this week," Casey said, arms now crossed against his chest.

"I don't seem to remember that," Blake said sarcastically.

"Yeah?" Casey said, "What about that black eye?"

"Must have ran into a wall or something," Blake said, shrugging his shoulders, obviously pissing Casey off.

"Listen kid," Casey said pointedly. "I don't appreciate it when little punks like you think you're better than everyone else."

"Yeah?" Blake responded. "Well I don't appreciate when girls are running around my baseball diamond in fucking mini-skirts!"

This sent Casey over the edge. He charged Blake, grabbing him by the top of his jersey, holding him up against the wall of the dugout. "You touch my little sister again," Casey threatened, "and I swear to God I will end you."

After an intense stare down, Casey finally let go of Blake's collar and stormed out of the dugout. Eventually he found the group of firemen and paramedics crowding around the hero of the game.

"Hey man, where ya been?" Severide asked, noticing that Casey had just arrived.

"Just had some business to take care of," replied Casey casually.

Casey made his way into the middle of the group, picking up KJ around the waist, and tickling her until she shrieked for him to put her down.

"Did you see me Matty?" KJ asked, her green eyes filled with excitement.

"I did baby girl. I'm so proud of you," Casey said planting a kiss on her forehead.

"Hey KJ!" Jake called out, running over to her. "All of us were gonna go grab a bite to eat to celebrate and we were wondering if you'd like to join us."

"Can I go with them? Please, Matty!" KJ pleaded with her brother.

"I guess," Casey said, giving into his sister's undeniable puppy eyes.

"Thank you Matty!" KJ exclaimed, placing a kiss on her older brother's cheek. No one missed the fact that Jake placed his hand on KJ's back to guide her away from the group and towards the rest of their teammates. Dawson and Shay were smirking, while Casey, Kelly, and Mills were glaring at the pair as they walked off into the night.

A/N: I hope you liked it! Please review and Happy Super Bowl Sunday!