Jorge De La Rosa traded to the Colorado Rockies from the Kansas City Royals
Jorge De La Rosa had spent parts of four seasons in the majors (primarily as a reliever) with the Milwaukee Brewers and Kansas City Royals before the Colorado Rockies acquired him for reliever Ramón Ramírez in 2008.
De La Rosa was actually acquired as a player to be named later in late April after the Rockies shipped Ramírez to Kansas City in March.
The Rockies decided to make him a starter and he became, arguably, the best starter in franchise history.
In parts of nine seasons as a Rockie, he went 86-61 with a 4.35 ERA in 209 games (200 starts) with a 105 ERA+ and a 4.24 FIP.
Among Rockies pitchers all-time, he’s the leader in wins (86), strikeouts (985), second in innings pitched and games started, third in WAR, fifth in WHIP, and sixth in ERA.
Germán Márquez traded to the Colorado Rockies from the Tampa Bay Rays
The Colorado Rockies acquired Germán Márquez from the Tampa Bay Rays in January 2016. He made his MLB debut with the Rockies later in the 2016 season.
Since, he has become the ace of the Colorado Rockies. Through 2021, he has spent parts of six seasons in the majors. He has a record of 54-41 with a 4.28 ERA (115 ERA+), a 3.85 FIP, and a 1.27 WHIP. He was an All-Star in 2021 and he has a career 15.4 rWAR. That WAR is already tied for fourth among Rockies pitchers and he is fifth in ERA, sixth in wins, third in strikeouts, first in WHIP, and first in BB/9.
He is contracted to play at least two more seasons with the Rockies after 2021 and there’s a team option for 2024, so he could get better in each of the categories.