Why did my soccer coach got super pissed at me for doing this....?

im a sophmore soccer player and yesterday a my game me and some friends had over heard the names of girls on the opposing team and were just making jokes about distracting the goalie and what not. anyway when the goalie caught a goal i said good job erin and the coach looked at me super pissed off. i dont think it was about me saying that to the goalie when she wasnt on our team because later when we lost like 8 to 0 and lined up everybody wanted to say good job to the goalie by her name but she got mad. why? is it disrespectful?