THEME:   none, but only 28 blocks   
GOOD ONES:     
Ballpark figs.   MGRS [not estimates but men]   
Card quality   WIT [not stock but clever person]   
Storyteller?   POLYGRAPH   
Short time out?   CAT NAP      
BTW:   AROD, Edgar MARTINEZ, and PICK-OFF anticipate Opening Day in two weeks --- so do I.      
Zip up   ANIMATE [zip up = make things more lively; animate = bring to life --- they seem quite different, but they both can mean 
enliven.]      
Is there such a term as 
ORE CARS?  I heard of 
hods.      
As themeless puzzles go, this is a-one, but without a theme....
RATING:    
 
Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun