Seth Smith spent the winter in wonderland. On Monday, the questions and uncertainty ended.

With the outfielder viewed as a luxury item after the signing of free agent Michael Cuddyer, the Rockies traded Smith to the Oakland Athletics for right-hander Guillermo Moscoso and left-hander Josh Outman. The Rockies are also closing in on signing 49-year-old starter Jamie Moyer to a minor-league deal, while continuing to explore trades for a second baseman.

Smith joins a battery of players jettisoned this winter — Huston Street, Ty Wigginton, Chris Iannetta and Ian Stewart — as the Rockies continue to add pitchers and deliberately change the clubhouse mix.

“It is going to be a raging competition for rotation spots in spring,” Rockies general manager Dan O’Dowd said. “Moscoso was probably Oakland’s second-best starter. And both he and Outman have versatility as starters or relievers. This continues with our plan of adding options for (manager) Jim (Tracy).”

Moscoso, 28, went 8-10 with 3.38 ERA in 128 innings last season. Outman, 27, appeared in 13 games, including nine starts. He finished with a 3.70 ERA.

A plethora of injuries over a two-week span in May created a rotation spot for Moscoso, and he never let it out of his grip. He believes his cutter will help him be effective in Coors Field but knows he must limit mistakes (he allowed 14 home runs last season).

A flyball pitcher, Outman, a former top prospect before elbow ligament surgery, conceded he must make adjustments at altitude. He gives the Rockies another lefty who profiles as a fifth starter or a long reliever.

O’Dowd confirmed that the Rockies are trying to finish up a minor-league deal with Moyer, who last pitched with the Phillies. The left-hander debuted in 1986 with the Cubs and went 9-9 with a 4.84 ERA with Philadelphia in 2010 before elbow surgery forced him to miss last season. He threw in winter ball and auditioned for scouts, including a representative from the Rockies.

Moyer would compete for a rotation spot and help tutor the young pitchers on staff. He is known for possessing one of baseball’s best changeups.

Smith understood a move was a possibility as he surfed the Internet this winter.

“I am excited. … I don’t really see it as a challenge as much as I see it as an opportunity,” said Smith, who projects as an everyday outfielder. “I’ve hit lefties well in the past, and for whatever reason I haven’t had as much success recently. I know what it looks like, but I also know that it’s not as bad as the numbers say it is.”

With Smith gone and the Rockies possessing a battery of young arms, they are in position to pursue a second baseman, a concern entering spring training. The Rockies have been aggressive in their pursuit of Atlanta’s Martin Prado but could not find a fit. Colorado also has had interest in Boston’s Marco Scutaro and the Mets’ Justin Turner.

Smith’s exit allows Charlie Blackmon, Eric Young Jr., Tyler Colvin and Jamie Hoffman to compete for two reserve outfield spots.

“Seth was a good player for us, but he was facing a more limited role,” O’Dowd said. “This creates more options.”

Troy E. Renck: 303-954-1294 or trenck@denverpost.com