Louie Varland's mediocre early results are hiding some really intriguing command building blocks.

Turn up the Rob Base, it's almost summer, or at least it feels like it. This week's lineups outlook dives into two post-hype prospects riding hot streaks, two players worth adding in leagues which reward on-base percentage and two hitters worth streaming next scoring period.

Brandon Marsh's strong April came with full underlying support, including a combination of upper-tier exit velocity and sprint speed.

Best skills by relevance and K%-BB%. Then, the ones that are sustainable by projection.

Zach Eflin is looking like TAM's latest reclamation project given the huge skills growth he showed in April.

Delving a bit deeper into the Pirates' lineup construction yielded an intriguing observation about how it mirrors a template put in place by the Rays. Jarred Kelenic's hot start has landed him third in the lineup over the last six days. Jarren Duran may be taking over the fifth spot in Boston, plus two streamers for next week.

Joey Gallo is looking the part of a late bloomer. He's quietly on his way to a career season thanks to a career-best contact rate that has been supported by improved swing decisions.

This column examines the early work in the Cubs, Tigers, Astros, Marlins, Giants, Rays, and Rangers pens and compares that work to the projected skills.

Joe Ryan's improved secondaries and firmly elite four-seam fastball have helped drive his command sub-indicators into elite territory.

Entering a new month, lineups remain in flux, including the top spots in the Nationals' lineup. Will they make the right call going forward? Joey Gallo exacted his revenge on the Yankees last series, and gets favorable match-ups at the onset of May, can he take over clean-up in Minnesota? Plus, hitters worth streaming for next scoring period.

Whit Merrifield's days of being an upper-tier contributor might be over given his growing swing-and-miss and poor batted ball quality.