ALLEN PARK — It’s a new day and a new offense for the Detroit Lions as they work out during the first week of training camp.

The rotation of players on the field in 7-on-7 and team drills is fast and furious, giving several players opportunities.

When it comes to running backs, expect a different look. Just not sure exactly what that will be yet.

“(The running back rotation) is yet to be determined,’’ quarterback Matthew Stafford said on Monday. “This league seems to be going running back by committee more and more.

“Who knows if that will be us, but it’s such a physical position. We have talented guys who have individual talents that can help our team in different ways. We plan on utilizing them as best we can,’’ Stafford added.

Obviously Reggie Bush and Joique Bell are 1A and 1B, in no particular order.

Theo Riddick shined in minicamp and offseason work. He could prove a good fit with this new offense which mirrors the New Orleans Saints. As a rookie, he was active in 14 games in 2013 and had nine carries for 25 yards.

Mikel Leshoure certainly had his share of work on Monday. Will that continue?

Leshoure was active for just three games in 2013 and had two carries for nine yards.

 Will he be the odd running back out?

“He came back in very good shape, he’s certainly running well at this stage,’’ coach Jim Caldwell said of Leshoure. “We like what we see. It’s early yet. If a guy can perform and play well, there’s always room for another good back. He’s a talented guy.”

(Follow @PaulaPasche on Twitter. Order her book,  “100 Things Lions Fans Should Know & Do Before They Die’’ here. It’s also available at bookstores.)