I found an error in the description:
“he put in the time, chipped 3 teeth, countless broken glasses, and a million hours of practice later, joined team yoyofactory, won a few titles, and toured the world”
In the bold, shouldn’t that be 3 chipped teeth as chipped is a verb when used there, but the words there should be nouns.
What
No. Because he didn’t start with 3 chipped teeth, it’s stating that he chipped 3 teeth in the process.
The way you have it would imply the teeth were already broken.
I’m still confused on WHY IT MATTERS
YYE trading cards are serious business. 
well then it is a rather abrupt transition.
Cards are SERIOUS BUSINESS! (But honestly, improper grammar is a pet peeve)
They are stating what he went through while on his journey through yoyoing
they are also using improper grammer 
WHERE?
I would agree, they are making a list of incomparable things.
I love Muphry’s law
I CHALLENGE YOU TO… A CHILDREN’S CARD GAME!!!
come one! your getting in a fight about grammer on a yoyo trading card! really? The cards are a fun bonus added in to maybe make you want to collect them all and buy more yoyoexpert merch. No need to make a federal case over whether its 3 chipped teeth or chipped 3 teeth.
Who is fighting?
us now but (sigh) it doesn’t really matter. You guys will eventually get into a heated debate about grammer bringing up one rule after another, disproving the others statements then getting the whole thread locked or just one of you will win. its a circle; it has no end. Not like rectangle; that has a lot of ends.(I now pronounce you chuck and larry reference.
^
Responding to a post does not initiate a fight. Insults initiate a fight.
Nobody here is insulted, right?
I’m a bit insulted that he thinks a discussion will turn into flame.
Oh yeah? you wanna go? 
Im joshing but when someone feels trapped in an arguement they resort to their lowest responses, insults included. I had a friend who when put at a end in an arguement will just say “SO?”.
So?
win
I added in the quotes and the comma that you forgot. Sorry, improper punctuation is a pet peeve of mine. 
Just kidding. You’re totally right on the grammar… I actually didn’t get to check the copy before it went to press, but poor grammar is a pet peeve of mine too. =)