On a quest to find his long-lost father, a godly athlete struggles for answers when he discovers his fugitive mother abducted him as a small child. Tagline: Basketball was just a game; finding out the truth became his goal.

I think this draft added further complications that don't contribute to much needed clarity.

The fact that he is an athlete is unrelated to his setting off to find his biological father. Additionally him being devout (better to specify a religion) seems unrelated to him being an athlete or a rape child.

If he on his own account decides to defy his mother and pursue his father's identity the jeopardy to his championship hope is of his own doing. This means that you are specifying in the logline the central dilemma the MC will face.

In my mind good loglines should present a character description and a contrasting situation that will inherently cause the reader to understand on their own the central dilemma the MC will face.

I'm not convinced that making the MC an athlete, a champion sports man or devout are helping this story.

Lets quickly look at the bare bones of your story as it is currently:

MC - Young offspring
inciting incident - Discovering the nature of their inception
External goal - Find the father

What type of character would suffer the most from this or encounter the biggest obstacles trying to achieve this goal?

Personally I would pick a lesbian detective that works for the sex crimes department of a police force and life long member of the young socialist party.

Because the violent crime was done against the mother and therefor a female perspective would increase the emotional stakes the MC will face when finding the father. More so by making her an active idealist she would be overly zealous in her morally apposition to this man as well as emotionally apposed to him. Lastly as a law enforcement officer she has the power to bring him to justice.

From this we can extrapolate multiple levels of dilemma and internal conflict. I want to find my dad but I want to put him in jail for the rest of his life. As a representative of the law will I be able to fulfill my duty and ignore my personal emotions? etc...

In short no need to explain how or why the MC will face a huge dilemma rather plant the seeds in the readers mind that will grow into the central dilemmas on their own accord.

Hope this helps, Nir.

Great comment from Nir... And what if you would just change the quest for something like : " seek to find why is fugitive mother abducted him as a small child"

Does this seem to work better?

Disbelieving he is a product of rape; a devout athlete's championship hopes are jeopardized when he defies his sadistic mother to uncover the heartrending truth about his long-lost dad.