Romero blanked Tampa Bay over the first four innings of Toronto's 5-0 whitewash of Rays, walking two batters while fanning four without surrendering a hit.
It was Romero's thrid start of Spring and his first win. Over three starts and nine full innings, Romero has given up just two hits and two walks, striking out 8 and keeping opposing hitters to a minuscule .071 batting average.
The Blue Jays have won 12 of 14 Grapefruit League games, and are the best team in the Florida league behind 10-1 Detroit.
Romero is getting set for his fourth season with the Blue Jays, having compiled an enviable 42-29 record with a 3.60 ERA in his first three seasons.
Seattle's Felix Hernandez put in his longest mound stint of the Spring, working six scoreless innings in the Mariners' 6-1 win over Milwaukee, in which the Brewers mustered only two hits.
Hernandez allowed just one of those hits, while striking out six Milwaukee batters and walking one. It was his third start, and his second win against one loss.
The 2009 Cy Young award winner, when he was 19-5 with a 2.43 ERA, Hernandez suffered through 2011 with a pedestrian 14-14 record, a 3.47 ERA, though he did manage to finish 4th in the league in strikeouts with 222.
Hernandez has a career record of 85-67 in seven seasons, all with Seattle.