DETROIT -- The Detroit Tigers are among six teams that have inquired about Washington Nationals starter John Lannan, CSSsports.com

.

The Tigers join the Orioles, Cubs, Red Sox and Astros as teams that have expressed interest in Lannan after he made it publicly known last week his desire to be traded.

FOX Sports’ Jon Paul Morosi

in Lannan, who was optioned to Washington’s Triple-A affiliate last week.

The 27-year-old Lannan will earn $5 million in 2012, making him the highest-paid player ever optioned to the minors before the end of spring training.

Despite Lannan’s request to be dealt, Nationals general manager Mike Rizzo told CBSSports.com that the club is not interested in dealing the left-hander.

“We haven't changed one bit. We're not looking to trade him,” Rizzo

. “We haven't solicited any trades, but we have fielded some calls.''

His comments Tuesday echo similar statements made by manager Davey Johnson last week.

Detroit could be looking to add depth to its rotation after right-hander Doug Fister was placed on the 15-day disabled list Sunday. He is eligible to return April 23, but the Tigers have not indicated a timetable as to when they expect him back.

As a result, manager Jim Leyland said left-hander Adam Wilk will be recalled later this week to make a scheduled start Saturday.

Wilk was a candidate for the No. 5 spot this spring that was eventually won by left-hander Drew Smyly. Smyly is expected to be called up after Wednesday’s game and will make his debut Thursday.

Lannan

with Triple-A Syracuse on Sunday, giving up five runs on six hits and two walks in two innings. His less-than-mediocre outing could have some teams second-guessing their interest.

If the Tigers are to further pursue Lannan, it appears unlikely they’d be willing to offer an above-average prospect and take on the $5 million that Lannan is owed.

Their interest likely is dependent on Smyly's effectiveness coupled with Fister's status as he deals with a bruised rib that could sideline him for more than three would-be starts.

-- Follow James Schmehl on Twitter: @jamesschmehl.