He was recently rumored to be dating Mad Men star January Jones.

But Nick Viall was back on the prowl as he was spotted with a mystery brunette in Los Angeles on Friday.

The former Bachelor hunk, 37, showcased his muscular physique in a tight black tee as he enjoyed the sunny day out with his female companion.

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Mystery lady: Nick Viall, 37, was back on the prowl as he was spotted with a mystery brunette in Los Angeles on Friday

Daring to impress, the young stud wrapped his bulging pectoral muscles in a tight henley that featured short sleeves.

His gorgeous gams were swathed in a pair of distressed denim as they were cuffed at the hems atop his red high tops.

He kept his trademark brunette tresses naturally curly as his beard was left scruffy.

The gorgeous raven haired acquaintance commanded attention in a plunging black top that boasted prairie sleeves.

Day date: The former Bachelor hunk, 37, showcased his muscular physique in a tight black tee as he enjoyed the sunny day out with his female companion

Ripped: Daring to impress, the young stud wrapped his bulging pectoral muscles in a tight henley that featured short sleeves

She stomped around the tony neighborhood of Larchmont Village in form fitting black leggings and a set black leather booties.

Meanwhile, Nick was rumored to be dating the Mad Men actress January Jones after they met on the James Cordon set back in January.

And before that, the handsome cad broke off his five month engagement to Vanessa whom he met on the 21st season of The Bachelor.

Stylish: She stomped around the tony neighborhood of Larchmont Village in form fitting black leggings and a set black leather booties

Nick got down on one knee presenting Vanessa with a Neil Lane 3.75-carat ring in the finale episode which aired in March. However, the couple had been plagued by rumors that they weren't getting along in recent months.

'It's with a great amount of heartbreak for the both us as we have decided to end our engagement,' the duo told E! News in a joint statement.

'We gave this relationship our all and we are saddened that we did not get the fairytale ending we hoped for.

'Their friends knew the relationship wouldn't last,' a source told People.

'It was a mismatch from the start. She's super fun, bubbly and outgoing and he's more of a serious personality and more introverted. She would try to bring him out of his shell, but he's just not as comfortable in big groups.' they added.