Here's MLB Pipeline's roundup of the top prospect performances in the Minor Leagues on Tuesday.
Twins' No. 1 prospect Royce Lewis, the No. 19 prospect in baseball -- had quite a 19th birthday, going 2-for-4 with his first career grand slam in Class A Cedar Rapids' 14-3 victory over Beloit. It was Lewis' fourth homer of the season, and third over the last 10 games. Overall, he's hitting .294/.343/.422 in 45 games.

MILB Video - Title: Lewis hits grand slam - Url: http://www.milb.com/r/video?content_id=2123273483

Other top prospect performances on Tuesday:
• Astros' No. 30 prospect Josh James went seven innings in Triple-A Fresno's 1-0 win over Colorado Springs. The 25-year-old right-hander surrendered only three hits while walking one and striking out 13, a career high. He's struck out 42 over his last five outings (28 1/3 innings), and sports a 2.52 ERA in 11 appearances (nine starts) this season.
:: Complete prospect coverage ::
• Braves' No. 18 prospect William Contreras had a big night at the plate in Class A Rome's 11-6 loss to Asheville, going 2-for-4 with a pair of solo homers. The 20-year-old catcher is hitting .290/.376/.449 with five home runs in 38 games.
• Zack Brown, the Brewers' No. 23 prospect, gave up one earned run (three runs overall) on four hits, while walking one and striking out 11 in Double-A Biloxi's 6-3 victory over Pensacola. Brown, a 23-year-old right-hander, improved his season ERA to 2.65 over 12 starts this season. In the same game, Milwaukee's No. 20 prospect, left fielder Troy Stokes Jr., went 1-for-4 with his eighth homer of the season.
• Mariners' No. 25 prospect Oliver Jaskie tossed six frames in Class A Clinton's 3-0 win over Burlington. The 22-year-old left-hander scattered seven hits, walked three and struck out five to bounce back from a rough previous start. In 11 starts this season, he's posted a 5.65 ERA.
• Cole Irvin, the Phillies' No. 23 prospect, turned in his seventh start of two earned runs or fewer, limiting Gwinnett to a run on five hits over six innings during Triple-A Lehigh Valley's 4-3 victory. He walked two and struck out six, lowering his 2018 ERA to 2.62.
• Oneil Cruz, the Pirates' No. 13 prospect, went 2-for-4 with a double and an RBI in Class A West Virginia's 10-1 victory over Lexington. The 19-year-old shortstop is slashing .292/.358/.521 with eight home runs in 51 games.
• A pair of Rangers prospects in Bubba Thompson (No. 6) and Pedro Gonzalez (No. 9) starred in Class A Hickory's 11-10 walk-off victory over Kannapolis. Each had three hits from the leadoff and second spot in the lineup, respectively. Thompson went went 3-for-5 with a triple, and Gonzalez was 3-for-4 with two doubles, a home run and a career-high 5 RBIs.
Thompson, a 19 year-old center fielder, is hitting .278/.337/.481 with two home runs and five steals in 20 games. Meanwhile, Gonzalez -- also a center fielder, but serving as the designated hitter in this game -- raised his batting average by 18 points with his big night, up to .243.
• Tigers' No. 11 prospect Mike Gerber doubled, homered and drove in four runs out of the leadoff spot during Triple-A Toledo's 8-7 walk-off victory over Buffalo. The 25-year-old center fielder upped his season average from .192 to .212 with the performance, and the homer was his fourth of the season in 24 games.

MILB Video - Title: Gerber goes yard - Url: http://www.milb.com/r/video?content_id=2123896283

• The White Sox saw their No. 14 and No. 18 prospects turn in strong performances. Spencer Adams yielded just an unearned run on six hits over seven innings in Double-A Birmingham's 2-1 loss to Jacksonville. The 22-year-old right-hander has tossed 15 consecutive innings without giving up an unearned run over his last two starts, lowering his season ERA from 6.42 to 4.88 in the process.
Meanwhile, Luis Gonzalez extended his hitting strerak to 17 games as he went 2-for-6 with a double and five RBIs out of the leadoff spot in Class A Kannapolis' loss to Hickory. In 47 games this season, he's hitting .327/.382/.546 with eight home runs and seven steals.
• Yankees' No. 13 prospect Jonathan Loaisiga tossed five strong innings in Double-A Trenton's 8-1 win over Richmond, giving up one run on one hit, walking none and striking out eight to lower his season ERA to 3.13.