The Colorado Rockies (15-22) bullpen couldn't hold on against the Arizona Diamondbacks (17-22), en route to a 9-7 loss yesterday in Denver. All nine of the Arizona runs were scored with two outs. Colorado led 4-1 and 7-4 before finally coming up short. The Rockies open a 3-game series against the Seattle Mariners (16-24) tonight at 6:40 at Coors Field (TV: Root Sports).

Rockies pitchers walked nine, yet expected to win and almost did. The D-backs walked in two runs, and gave away a run on an error in between -- in the eighth -- and did win, 9-7, to gain a split of a two-game series.

Official: Thursday's Box Score.

Rockies manager Jim Tracy hates the continuing story of walks. The Rockies, who entered Thursday trailing only the Padres and Reds, have walked 143 and have a 5.00 ERA going into a three-game Interleague Play series with the Mariners starting Friday night.

"We can't pitch any worse than that," Tracy said.

On Thursday, Tulowitzki's two-run homer in the first inning -- his fourth of the season but first in 67 at-bats -- was part of a 3-0 lead the Rockies gave starter Juan Nicasio. But partly because being hit on the right hip by a line drive by the game's second batter cost him his push-off ability, Nicasio walked five, threw strikes on just 57 of his 106 pitches, and was gone after 4 2/3 innings.

Rex Brothers (two hits, two walks -- one intentional, and four runs) and Esmil Rogers (RBI singles to two of the three batters he faced) were victims of a four-run eighth that gave the D-backs a 7-4 lead. Brothers and Rogers entered the season expected to fill key roles, but both have been wild and hittable far too often.

Tickets are available for tonight's game at Coors Field vs. the Seattle Mariners, and can be purchased by calling (800) 388-ROCK, or click here.