Note: This list's order was not set by me, but by MLB.com. I've provided my video, photo and interviews as additions. MLB’s list can be found here. Click each player's name for more content.
15. MAC WILLIAMSON
RF | San Jose Giants (A+) | 6’4″ | 235 lbs | 2012, 3rd round | 24-years old
From MLB.com: "Originally recruited by Wake Forest as a pitcher, Williamson became a full-time hitter after having shoulder surgery as a freshman. His power enticed the Giants to draft him in the third round in 2012 and he led the system with 25 homers during his first full pro season. Another surgery cut his 2014 season short, as he underwent Tommy John surgery in April.
Williamson packs a lot of strength in his 6-foot-5, 240-pound frame, giving him power to all fields. San Francisco sees him as more than just a masher. While Williamson can have trouble with breaking balls, he made some nice adjustments in the second half of 2013.
Williamson is a better athlete than most players his size, as he has close to average speed and moves well in the outfield. When healthy, he has a strong arm and fits the right-field profile well."
My take: Williamson is almost a five-tool player. He clearly has power (25 HR with San Jose in 2013) and the average seems to be there as well (.292). He showed good plate discipline, drawing 51 walks last year, resulting in a .375 on-base percentage. Though he doesn't use it often, his speed on the base paths is similar to Hunter Pence. It will be interesting to see if he utilizes the same speed he displays in the outfield on the bases. Williamson had 15 outfield assists in 2013, so clearly his arm is at least accurate. Witnessing him personally, I can vouch for his arm's strength. Even at No. 15, I still believe he is one of the underrated prospects in the Giants system. It's a shame he and to endure Tommy John surgery in April. I could've seen him peeking into the bigs by 2015.
16. Derek Law
RHP | Richmond Flying Squirrels (AA) | 6’2″ | 210 lbs | 2011, 4th round | 24-years old
From MLB.com: "Joe Law spent eight years in the Athletics' Minor League system, and he got called to the Majors briefly in 1988 without appearing in a game. His son Derek has a chance to make it one step further, though his rapid ascent was put on hold when he underwent Tommy John surgery in June.
Law's unconventional mechanics include a lot of twists and turns before he comes nearly straight over the top and lands on a stiff front leg. Yet he has absolutely no problem throwing strikes, as evidenced by his 45/1 strikeout-to-walk ratio once he got to the California League last year.
Law's arm slot allows him to throw a curveball with big downward break, and it's a legitimate swing-and-miss pitch. His delivery adds some deception to his low-90s sinker, and he can also mix in a slider. Law may not have the truly dominant pitch to become a closer, but he could be a setup man."
My take: Law processes that rare mix of power, movement, and deception. With the back turning almost completely to the batter in the wind-up, Law makes it very difficult for opposing hitters to pick up the ball. Tommy John surgery in June derailed his quick descent through the system, however. Between him and Hunter Strickland, among others, the Giants are stacked with future closers, and I wouldn't be surprised to see Law take command of that role at some point in 2015.