You'd never know it by the big league club, but no organization is having a better year in the minor leagues than the Kansas City Royals.

Between Mike Montgomery, Mike Moustakas, Wil Myers, Eric Hosmer, John Lamb and Chris Dwyer the Royals have a sextet of prospects who have taken serious strides forward this season. All six have produced on the diamond this season while also earning midseason promotions.

This weekend Hosmer made his Double-A debut. The first baseman had hit .354/.429/.545 at high Class A Wilmington, and about the only criticism that could be made about his season was his lack of home run power. He did hit 29 doubles, but he had only seven home runs for the Blue Rocks.

That hasn't been a problem in Double-A. Hosmer homered in his first at-bat with Northwest Arkansas. He followed that up with a second home run and a double in Sunday's game.

But Hosmer isn't the only Royal to have a big weekend. Chris Dwyer, a lefthander who also recently made the trip from Wilmington Double-A Northwest Arkansas, struck out seven while allowing two hits and one earned run in the Naturals win on Sunday. Dwyer is now 2-0, 1.06 in three starts since his promotion.

Down at low Class A Burlington, righthander Tyler Sample threw the best start of his pro career on Saturday. Sample allowed one hit in seven innings, walking three and striking out five in a win over Dayton. Sample, the No. 14 prospect in the Royals system coming into the season, has been considered one of the better arms in the system, but control troubles have kept him from taking advantage of his stuff. He's starting to figure it out however, as his 2-3, 2.86 record since the all-star break attests. Before the break, Sample was walking seven batters per nine innings. Since the break he's cut that in half to 3.5 walks per nine.

Here's a look at some other standouts from this past weekend's action.

Matt Moore, lhp, Rays: Moore's command still isn't what it will need to be, but he has improved his control enough to turn around what was a very rough start to the season. Moore was 0-7, 6.63 after his June 3 start. Since then he's gone 4-2, 2.10 with roughly two less walks per nine innings. He's still striking out hitters at an amazing rate as well–he fanned 11 Brevard County hitters in six innings on Saturday, which gives him 133 strikeouts in 97 innings for the season.

Joe Wieland, rhp, Rangers: Wieland had a pretty impressive start to the season as part of a stacked low Class A Hickory staff. But the California League has been chewing him up like it does many young pitchers. Wieland came into Saturday's start with an ERA above 10.00 after three Cal League outings. He got his ERA back into single digits on Saturday by striking out 10 and allowing one run in six innings against Visalia.

Oswaldo Arcia, of, Twins: Arcia was one of a pair of very intriguing sleepers in the Twins system coming into the year (along with righthander Adrian Salcedo). But it would have been hard to envision this good of a start to his 2010 season. Playing for rookie-level Elizabethton (Appalachian), Arcia is hitting .385/.430/.760. He leads the league in batting average, hits and slugging percentage and moved into second place in doubles with doubles on Saturday and Sunday.