Gregory Luttrell was named senior portfolio manager at JPMorgan Asset Management. It is a new position. Mr. Luttrell will be part of the firms growth equity team and will manage a new growth strategy that is expected to launch later this year, confirmed a spokeswoman. Further details on this strategy were not immediately available. Mr. Luttrell was a portfolio manager at TIAA-CREF, where, he co-managed roughly $13 billion in growth assets along with portfolio manager Susan Hirsch, according to a TIAA-CREF spokesman. Andrea Mitroff, a large-cap growth portfolio manager, will co-manage the overall growth team with Ms. Hirsch.