I it almost time for baseball yet?
Opening day should be made a holiday.  Who will throw out the first pitch?
The President of the United States. I think thats the norm. I may have to look it up.
Who every throws it, they will do better than Justin Bieber did in 2010. 
I'll have to look that up too! How did that go? Was it funny?
It was described as high and floaty. Last year a famous doctor did reasonably well, for an academic.  
I wonder why Trump never threw out a first pitch? Every other president did it.
Trump,  New York Yankees fan, has attended games.  Perhaps he was not asked. It is a nice bit of ceremony that marks the start of the MLB season.
What I found said he refused because he was afraid he would look fat. First president in 100 years not to do it. 
In the regular season in 2006 he threw out the first pitch in a Yankees game.  Maybe it was all the experience he wanted/needed.