Iowa City, Iowa -- Senior right-handed pitcher Leigh Ann Walker used a record-breaking performance to lead the seventh-ranked Nebraska softball team to a 3-0 win over Iowa Friday night in NCAA Regional action at Pearl Field. Walker, who combined with Peaches James for a three-hit shutout, struck out six Hawkeyes in six innings to become the all-time NU career strikeouts leader with 844. Walker, who shared the record with NU assistant coach Lori Sippel prior to Friday