Berrios, 21, has posted a 27/1 strikeout-to-walk ratio in 20 innings in his last three starts, and considering he has less than 150 innings under his belt this season -- after logging 140 frames in 2014 -- there shouldn't be any concerns about his workload if the Twins were to promote him in September. He currently leads all Minor Leaguers with 153 strikeouts.
The rest of the 10 best performances from top Minor Leaguers
• D-backs No. 4 prospect (No. 88 overall) Braden Shipley continued his second-half resurgence Friday with seven strong innings for Double-A Mobile in a 2-1 eight-inning loss to Jacksonville. The 23-year-old right-hander yielded one unearned run on three hits and a walk over seven innings, striking out three. After pitching to a 4.50 ERA, 1.54 WHIP and 50/37 strikeout-to-walk ratio in 14 starts during the first half of the season, Shipley owns a 2.28 ERA, 1.07 WHIP and 48/15 strikeout-to-walk ratio over his last 11 starts.
• Dodgers No. 1 prospect (No. 2 overall) Corey Seager's home-run drought finally came to an end Friday when the 21-year-old connected for his 15th homer of the season. The last time Seager hit one was July 28, meaning the left-handed hitting shortstop/third baseman went 22 games between home runs. Though he's scuffled for most of August, Seager has shown signs of heating up of late, collecting hits in five of his last six games with a .321 average in that span. Despite his second-half struggles, Seager is still batting .295/.346/.475 with 15 home runs, 31 doubles and 62 RBIs in 112 games this season between Double-A Tulsa and Triple-A Oklahoma City.
• Giants No. 3 prospect Phil Bickford has been a bat-missing machine to begin his professional career. On Friday, the hard-throwing 20-year-old fanned five batters in three innings for the Arizona League Giants, giving him 26 strikeouts in 19 1/3 innings. That came after he fanned seven batters in 2 1/3 innings his last time out. On top of that, Bickford has surrendered just 12 hits this season and has yet to give up a home run, with opposing hitters batting only .179 against the talented right-hander.
• Giants No. 13 prospect Mac Williamson had a perfect day at the plate Friday for Triple-A Sacramento, going 4-for-4 with a home run, double, three runs scored and four RBIs. The 25-year-old outfielder, who missed most of the 2014 season recovering from Tommy John surgery, has swung a hot bat of late for the River Cats, with a .414 batting average and 17 hits in his last 11 games. Williamson is batting .274 with an .856 OPS and five home runs in 37 games since moving up to the Pacific Coast League.
• Mariners No. 7 prospect Tyler O'Neill homered for the third straight game on Friday as part of a 1-for-3 performance for Class-A Advanced Bakersfield. The 2013 third-rounder is batting .254/.304/.550 with 78 RBIs in 92 games this season and his 29 dingers this season are tied for second-place among all Minor Leaguers. Granted he's benefited from playing the hitter-friendly California League, but the 20-year-old outfielder has been lauded for his robust raw power.
• Marlins No. 19 prospect Austin Brice essentially matched Shipley's line in a pitchers' duel, allowing one unearned run in seven innings for Double-A Jacksonville in the team's 2-1 win. The 23-year-old right-hander scattered four hits and one walk in the outing while striking out eight batters. Brice has been sharp over his last three starts, allowing just two earned runs on 11 hits to go along with a 18/4 strikeout-to-walk ratio in 19 innings.
• Rays No. 11 prospect Richie Shaffer swatted his 26th home run of the season -- not including the two he hit during an eight-game stint with the Rays earlier this month -- on Friday for Triple-A Durham as part of a 3-for-5 performance in a 7-6 14-inning win against Toledo. The 24-year-old corner infielder also hit a pair of doubles, scored two runs and plated three. Shaffer is batting .274/.366/.564 with 51 extra-base hits and 68 RBIs this season in 99 games between Double-A Montgomery and Durham.
• White Sox No. 2 prospect (No. 60 overall) Frankie Montas continued to roll on Friday night, picking up the win for Double-A Birmingham with six scoreless frames in a 7-2 win over Mississippi. Throwing 60 of 99 pitches for strikes, the 22-year-old right-hander allowed a pair of hits and three walks in the outing while fanning six batters. Montas, who features a fastball in the mid- to upper-90s as well as a sharp slider that's a work in progress, has made a strong case to be called up in September, posting a 2.42 ERA, 1.14 ERA and 54/18 strikeout-to-walk ratio over his last 48 1/3 innings (10 starts).
• White Sox No. 11 prospect Jordan Guerrero added to his breakout campaign Friday with eight innings of one-run ball for Class-A Advanced Winston-Salem in the team's 4-1 win. The 6-foot-3, 190-pound left-hander surrendered four hits and one walk while striking out four. Guerrero owns a 3.08 ERA, 1.05 WHIP and 135/31 strikeout-to-walk ratio over 140.1 innings this season (23 starts), and he's 3-1 with a 1.64 ERA and 32/7 strikeout-to-walk ratio in his last five starts (33 innings).