Bill James' game score calculation rewards pitchers who work deep into games without allowing many runs or hits while providing extra credit for dominance (strikeouts) and control (few walks). It may not be perfect, but tallying game scores for a number of pitchers can winnow a crowded field in a hurry. Presented here are the top 10 game scores from weekend series, April 27-29, by pitchers who appear in the 2012 Baseball America Prospect Handbook.

Lefty Justin Wilson and Indianapolis relievers Jose Diaz and Doug Slaten combined to no-hit Durham and send the Bulls reeling to their 13th consecutive loss. Wilson features premium heat from the left side but needs to continue finding the strike zone (16 walks in 30 innings so far) as he did yesterday to one day make an impact in the Pittsburgh rotation . . . Rockies lefty Edwar Cabrera has not only survived the jump to Double-A, but so far his changeup has wreaked havoc on Texas League opponents . . . Angels lefty Nick Maronde, a third-rounder from Florida last June, is gaining speed in the California League. He delivered seven shutout innings and 12 strikeouts against High Desert on Friday, and over his past three starts for high Class A Inland Empire he's allowed just four runs in 21 innings while fanning 23 and walking three. Forgive him his two homers allowed—they came in High Desert . . . Maronde isn't the only lefty who bears watching in the Cal League this season. Bakersfield's Tony Cingrani (Reds) and Visalia's David Holmberg (Diamondbacks) also have been stellar, but perhaps no southpaw has outperformed Visalia's Andrew Chafin, the 43rd pick in last year's draft from Kent State. With 12 strikeouts versus San Jose on Saturday, Chafin assumed the minor league lead with 45 whiffs in 27 2/3 innings . . . Give Astros righty R.J. Alaniz credit: He's already made two starts at home in Lancaster and one other in High Desert this season, and he's lived to tell about it (his 31 innings ranks third in the Cal League). The line you see above (seven strikeouts, two walks in seven shutout innings) was compiled at home versus Stockton.

Top Performance By A Prospect-Eligible Pitcher Outside His Team's Top 30

High Class A Lake Elsinore righthander Burch Smith carried a no-hitter into the eighth inning on Saturday before surrendering a double to the leadoff batter. He struck out 13 Rancho Cucamonga opponents and walked two while allowing one run through 7 2/3 innings. A Padres 14th-round selection from Oklahoma last June, Smith improved to 2-2, 3.67 through five starts, and he sports a 33-to-5 strikeout-to-walk ratio through 27 innings this season. The 22-year-old signed for a well-above-slot $250,000 and skipped low Class A entirely on his way to the California League.

Worst Game Score By A Prospect

A pair of Venezuelan lefties pitching at the Triple-A level turned in indistinguishably poor starts over the weekend. Pitching for Tacoma, the Mariners' Mauricio Robles got roughed up in Las Vegas, allowing eight runs in two innings. He faced 15 batters and allowed six hits (including two home runs) and four walks. The Rays' Alex Torres upped the ante by allowing seven runs (six earned) in only one innings in a home start for Durham versus Indianapolis. He faced 12 batters and allowed eight to reach base via six hits and two walks. Neither Robles nor Torres recorded a strikeout.