My favorite sports team the New Orleans Saints play on Sunday.

Let's fix this sentence!

My favorite sports team ,the New Orleans Saints, play on Sunday.

Use the commas for parts of a sentence that could be removed. Like bars you could grab and remove in the sentence.

My dog is energetic playful and soft.

Let's fix this sentence!

My dog is energetic, playful, and soft.

Use commas to separate two or more coordinate adjectives that describe the same noun.

I have a play date tomorrow I better get some rest now.

Let's show them the right way, Grammar Hammer!

I have a play date tomorrow; I better get some rest now.

A semi colon is used here because it separates two sentences that can be brought together.

"May I have a sip of that soda"? asked Bill.

Let's fix that sentence!

"May I have a sip of that soda?" asked Bill.

Questions marks are always used inside a quote unless the full sentence is a question.