。、。
No way. You're tall, so you've gotta play at the front.
Literal
No-good is [よ]. You, tall is-[because-んだから] front-guard [to-に] come-[for-me-てくれ] [if-not-ないと].
A team assignment. 前衛 ('front guard / forward') is a positioning term used in volleyball, badminton, and similar team sports where players rotate through positions. Contrast with 後衛 ('back guard / defender'). 背が高い ('tall') uses 背 ('stature, back') as the subject of 高い. ~てくれないと ('if you don't do it for me, ...') is the truncated form of ~てくれないとだめ ('you have to do it for me'). Casual coaching/teammate pressure.