Jesus Montero is in Seattle. Manny Banuelos is struggling with his control and went on the disabled list. Dellin Betances has more walks (17) than strikeouts (16) in Triple-A.

By the end of the year, could Mason Williams be the Yankees' No. 1 prospect? Given his combination of tools and track record (albeit a relatively brief one), it's certainly possible.

Playing for low Class A Charleston, Williams had his best game of the year today, going 4-for-4 with a double, a walk and his first home run of the season, raising his batting line to .347/.375/.507. Williams, a 20-year-old center fielder, has shown a promising package of athleticism, well-above-average speed and hitting instincts. He's swiped eight bases in nine tries, struck out just four times in 80 trips to the plate and has the tools to be an above-average defender in center field.

So while Williams could end up as the Yankees' top prospect by the end of the year, it's still a debate among scouts about whether he's even the best prospect on his own team. Charleston catcher Gary Sanchez is hitting .365/.420/.476 in 16 games and righthander Vicente Campos is showing command of a mid-90s fastball to pick apart South Atlantic League hitters, so Williams certainly has competition for the top spot in the organization.